70721747886 has 16 divisors (see below), whose sum is σ = 146006189568. Its totient is φ = 22813467000.

The previous prime is 70721747879. The next prime is 70721747893. The reversal of 70721747886 is 68874712707.

It is an interprime number because it is at equal distance from previous prime (70721747879) and next prime (70721747893).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190112040 + ... + 190112411.

It is an arithmetic number, because the mean of its divisors is an integer number (9125386848).

Almost surely, 2^70721747886 is an apocalyptic number.

70721747886 is an abundant number, since it is smaller than the sum of its proper divisors (75284441682).

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

70721747886 is a wasteful number, since it uses less digits than its factorization.

70721747886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380224487.

The product of its (nonzero) digits is 7375872, while the sum is 57.

The spelling of 70721747886 in words is "seventy billion, seven hundred twenty-one million, seven hundred forty-seven thousand, eight hundred eighty-six".