70734464640 has 384 divisors, whose sum is σ = 293843721600. Its totient is φ = 15316770816.

The previous prime is 70734464639. The next prime is 70734464663. The reversal of 70734464640 is 4646443707.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 719914 + ... + 812246.

It is an arithmetic number, because the mean of its divisors is an integer number (765218025).

Almost surely, 2^70734464640 is an apocalyptic number.

70734464640 is a gapful number since it is divisible by the number (70) 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 70734464640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146921860800).

70734464640 is an abundant number, since it is smaller than the sum of its proper divisors (223109256960).

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

70734464640 is a wasteful number, since it uses less digits than its factorization.

70734464640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92384 (or 92369 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 45.

The spelling of 70734464640 in words is "seventy billion, seven hundred thirty-four million, four hundred sixty-four thousand, six hundred forty".