156644032212 has 144 divisors (see below), whose sum is σ = 445691937600. Its totient is φ = 46095436800.

The previous prime is 156644032199. The next prime is 156644032219. The reversal of 156644032212 is 212230446651.

156644032212 is a `hidden beast` number, since 1 + 5 + 6 + 644 + 0 + 3 + 2 + 2 + 1 + 2 = 666.

It is a super-2 number, since 2×156644032212² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156644032219) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1107739 + ... + 1241117.

It is an arithmetic number, because the mean of its divisors is an integer number (3095082900).

Almost surely, 2^156644032212 is an apocalyptic number.

156644032212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156644032212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222845968800).

156644032212 is an abundant number, since it is smaller than the sum of its proper divisors (289047905388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156644032212 is a wasteful number, since it uses less digits than its factorization.

156644032212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133526 (or 133521 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 156644032212 its reverse (212230446651), we get a palindrome (368874478863).

The spelling of 156644032212 in words is "one hundred fifty-six billion, six hundred forty-four million, thirty-two thousand, two hundred twelve".