70902161938 has 4 divisors (see below), whose sum is σ = 106353242910. Its totient is φ = 35451080968.

The previous prime is 70902161921. The next prime is 70902161951. The reversal of 70902161938 is 83916120907.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 64514476009 + 6387685929 = 253997^2 + 79923^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17725540483 + ... + 17725540486.

Almost surely, 2^70902161938 is an apocalyptic number.

70902161938 is a deficient number, since it is larger than the sum of its proper divisors (35451080972).

70902161938 is a wasteful number, since it uses less digits than its factorization.

70902161938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35451080971.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 70902161938 in words is "seventy billion, nine hundred two million, one hundred sixty-one thousand, nine hundred thirty-eight".