251601252046 has 16 divisors (see below), whose sum is σ = 379646467200. Its totient is φ = 125053014240.

The previous prime is 251601251977. The next prime is 251601252103. The reversal of 251601252046 is 640252106152.

It is a super-2 number, since 2×251601252046² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723580 + ... + 1013296.

It is an arithmetic number, because the mean of its divisors is an integer number (23727904200).

Almost surely, 2^251601252046 is an apocalyptic number.

251601252046 is a deficient number, since it is larger than the sum of its proper divisors (128045215154).

251601252046 is a wasteful number, since it uses less digits than its factorization.

251601252046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292299.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 251601252046 its reverse (640252106152), we get a palindrome (891853358198).

The spelling of 251601252046 in words is "two hundred fifty-one billion, six hundred one million, two hundred fifty-two thousand, forty-six".