70649257536 has 420 divisors, whose sum is σ = 247425173424. Its totient is φ = 19759334400.

The previous prime is 70649257531. The next prime is 70649257561. The reversal of 70649257536 is 63575294607.

70649257536 is a `hidden beast` number, since 7 + 0 + 64 + 9 + 2 + 575 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (70649257531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 9633391 + ... + 9640721.

Almost surely, 2^70649257536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70649257536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123712586712).

70649257536 is an abundant number, since it is smaller than the sum of its proper divisors (176775915888).

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

70649257536 is a wasteful number, since it uses less digits than its factorization.

70649257536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392 (or 7360 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 54.

The spelling of 70649257536 in words is "seventy billion, six hundred forty-nine million, two hundred fifty-seven thousand, five hundred thirty-six".