156866782464 has 720 divisors, whose sum is σ = 571116623616. Its totient is φ = 41803776000.

The previous prime is 156866782439. The next prime is 156866782469. The reversal of 156866782464 is 464287668651.

It is a happy number.

156866782464 is a `hidden beast` number, since 1 + 568 + 6 + 6 + 7 + 8 + 2 + 4 + 64 = 666.

It is a super-2 number, since 2×156866782464² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156866782469) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 372604974 + ... + 372605394.

Almost surely, 2^156866782464 is an apocalyptic number.

156866782464 is a gapful number since it is divisible by the number (14) 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 156866782464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285558311808).

156866782464 is an abundant number, since it is smaller than the sum of its proper divisors (414249841152).

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

156866782464 is a wasteful number, since it uses less digits than its factorization.

156866782464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 601 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 63.

The spelling of 156866782464 in words is "one hundred fifty-six billion, eight hundred sixty-six million, seven hundred eighty-two thousand, four hundred sixty-four".