156055232640 has 128 divisors (see below), whose sum is σ = 497626012800. Its totient is φ = 41598001152.

The previous prime is 156055232629. The next prime is 156055232647. The reversal of 156055232640 is 46232550651.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (156055232647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5193981 + ... + 5223939.

It is an arithmetic number, because the mean of its divisors is an integer number (3887703225).

Almost surely, 2^156055232640 is an apocalyptic number.

156055232640 is a gapful number since it is divisible by the number (10) 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 156055232640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248813006400).

156055232640 is an abundant number, since it is smaller than the sum of its proper divisors (341570780160).

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

156055232640 is a wasteful number, since it uses less digits than its factorization.

156055232640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32694 (or 32682 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 156055232640 in words is "one hundred fifty-six billion, fifty-five million, two hundred thirty-two thousand, six hundred forty".