70395640891 has 8 divisors (see below), whose sum is σ = 72118476864. Its totient is φ = 68673084480.

The previous prime is 70395640883. The next prime is 70395640919. The reversal of 70395640891 is 19804659307.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 70395640891 - 2³ = 70395640883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70395640591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495070 + ... + 621196.

It is an arithmetic number, because the mean of its divisors is an integer number (9014809608).

Almost surely, 2^70395640891 is an apocalyptic number.

70395640891 is a deficient number, since it is larger than the sum of its proper divisors (1722835973).

70395640891 is a wasteful number, since it uses less digits than its factorization.

70395640891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139781.

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 70395640891 in words is "seventy billion, three hundred ninety-five million, six hundred forty thousand, eight hundred ninety-one".