70899401664 has 336 divisors, whose sum is σ = 263285102080. Its totient is φ = 17714350080.

The previous prime is 70899401647. The next prime is 70899401693. The reversal of 70899401664 is 46610499807.

It is a tau number, because it is divible by the number of its divisors (336).

It is a self number, because there is not a number n which added to its sum of digits gives 70899401664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 960309 + ... + 1031499.

Almost surely, 2^70899401664 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 70899401664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131642551040).

70899401664 is an abundant number, since it is smaller than the sum of its proper divisors (192385700416).

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

70899401664 is a wasteful number, since it uses less digits than its factorization.

70899401664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71248 (or 71235 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 70899401664 in words is "seventy billion, eight hundred ninety-nine million, four hundred one thousand, six hundred sixty-four".