70721521011154 has 32 divisors (see below), whose sum is σ = 115808541534000. Its totient is φ = 32195042694144.

The previous prime is 70721521011139. The next prime is 70721521011187. The reversal of 70721521011154 is 45111012512707.

It can be written as a sum of positive squares in 8 ways, for example, as 50981956227225 + 19739564783929 = 7140165^2 + 4442923^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36415989 + ... + 38308840.

Almost surely, 2^{70721521011154} is an apocalyptic number.

70721521011154 is a deficient number, since it is larger than the sum of its proper divisors (45087020522846).

70721521011154 is a wasteful number, since it uses less digits than its factorization.

70721521011154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74725342.

The product of its (nonzero) digits is 19600, while the sum is 37.

The spelling of 70721521011154 in words is "seventy trillion, seven hundred twenty-one billion, five hundred twenty-one million, eleven thousand, one hundred fifty-four".