70991072087 has 16 divisors (see below), whose sum is σ = 80384750880. Its totient is φ = 62233315200.

The previous prime is 70991072059. The next prime is 70991072107. The reversal of 70991072087 is 78027019907.

It is a cyclic number.

It is not a de Polignac number, because 70991072087 - 2²⁸ = 70722636631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70991072057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1520489 + ... + 1566482.

It is an arithmetic number, because the mean of its divisors is an integer number (5024046930).

Almost surely, 2^70991072087 is an apocalyptic number.

70991072087 is a deficient number, since it is larger than the sum of its proper divisors (9393678793).

70991072087 is a wasteful number, since it uses less digits than its factorization.

70991072087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087074.

The product of its (nonzero) digits is 444528, while the sum is 50.

The spelling of 70991072087 in words is "seventy billion, nine hundred ninety-one million, seventy-two thousand, eighty-seven".