2157207736258 has 8 divisors (see below), whose sum is σ = 3235845428028. Its totient is φ = 1078592593584.

The previous prime is 2157207736247. The next prime is 2157207736279. The reversal of 2157207736258 is 8526377027512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2151346762009 + 5860974249 = 1466747^2 + 76557^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2157207736199 and 2157207736208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5396041 + ... + 5782012.

Almost surely, 2^{2157207736258} is an apocalyptic number.

2157207736258 is a deficient number, since it is larger than the sum of its proper divisors (1078637691770).

2157207736258 is a wasteful number, since it uses less digits than its factorization.

2157207736258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11274548.

The product of its (nonzero) digits is 9878400, while the sum is 55.

The spelling of 2157207736258 in words is "two trillion, one hundred fifty-seven billion, two hundred seven million, seven hundred thirty-six thousand, two hundred fifty-eight".