70978905431 has 8 divisors (see below), whose sum is σ = 81130093440. Its totient is φ = 60830553528.

The previous prime is 70978905407. The next prime is 70978905493. The reversal of 70978905431 is 13450987907.

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

It is a cyclic number.

It is not a de Polignac number, because 70978905431 - 2²² = 70974711127 is a prime.

It is a super-2 number, since 2×70978905431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70978905931) 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, 655121 + ... + 755738.

It is an arithmetic number, because the mean of its divisors is an integer number (10141261680).

Almost surely, 2^70978905431 is an apocalyptic number.

70978905431 is a deficient number, since it is larger than the sum of its proper divisors (10151188009).

70978905431 is a wasteful number, since it uses less digits than its factorization.

70978905431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418053.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 70978905431 in words is "seventy billion, nine hundred seventy-eight million, nine hundred five thousand, four hundred thirty-one".