255198157636 has 6 divisors (see below), whose sum is σ = 446596775870. Its totient is φ = 127599078816.

The previous prime is 255198157619. The next prime is 255198157651. The reversal of 255198157636 is 636751891552.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 247366969600 + 7831188036 = 497360^2 + 88494^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31899769701 + ... + 31899769708.

Almost surely, 2^255198157636 is an apocalyptic number.

It is an amenable number.

255198157636 is a deficient number, since it is larger than the sum of its proper divisors (191398618234).

255198157636 is a wasteful number, since it uses less digits than its factorization.

255198157636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63799539413 (or 63799539411 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 58.

The spelling of 255198157636 in words is "two hundred fifty-five billion, one hundred ninety-eight million, one hundred fifty-seven thousand, six hundred thirty-six".