70431535957 has 4 divisors (see below), whose sum is σ = 70436986380. Its totient is φ = 70426085536.

The previous prime is 70431535931. The next prime is 70431535969. The reversal of 70431535957 is 75953513407.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75953513407 = 89 ⋅853410263.

It can be written as a sum of positive squares in 2 ways, for example, as 5321848401 + 65109687556 = 72951^2 + 255166^2 .

It is a cyclic number.

It is not a de Polignac number, because 70431535957 - 2⁷ = 70431535829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70431535957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70431535907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2705782 + ... + 2731687.

It is an arithmetic number, because the mean of its divisors is an integer number (17609246595).

Almost surely, 2^70431535957 is an apocalyptic number.

It is an amenable number.

70431535957 is a deficient number, since it is larger than the sum of its proper divisors (5450423).

70431535957 is a wasteful number, since it uses less digits than its factorization.

70431535957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5450422.

The product of its (nonzero) digits is 1984500, while the sum is 49.

The spelling of 70431535957 in words is "seventy billion, four hundred thirty-one million, five hundred thirty-five thousand, nine hundred fifty-seven".