70602256138 has 4 divisors (see below), whose sum is σ = 105903384210. Its totient is φ = 35301128068.

The previous prime is 70602256133. The next prime is 70602256157. The reversal of 70602256138 is 83165220607.

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., 67279540689 + 3322715449 = 259383^2 + 57643^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 70602256138.

It is not an unprimeable number, because it can be changed into a prime (70602256133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17650564033 + ... + 17650564036.

Almost surely, 2^70602256138 is an apocalyptic number.

70602256138 is a deficient number, since it is larger than the sum of its proper divisors (35301128072).

70602256138 is a wasteful number, since it uses less digits than its factorization.

70602256138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35301128071.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 70602256138 in words is "seventy billion, six hundred two million, two hundred fifty-six thousand, one hundred thirty-eight".