51361101646 has 16 divisors (see below), whose sum is σ = 77606634528. Its totient is φ = 25492464000.

The previous prime is 51361101637. The next prime is 51361101689. The reversal of 51361101646 is 64610116315.

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, 373426 + ... + 492106.

It is an arithmetic number, because the mean of its divisors is an integer number (4850414658).

Almost surely, 2^51361101646 is an apocalyptic number.

51361101646 is a deficient number, since it is larger than the sum of its proper divisors (26245532882).

51361101646 is a wasteful number, since it uses less digits than its factorization.

51361101646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120267.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 51361101646 in words is "fifty-one billion, three hundred sixty-one million, one hundred one thousand, six hundred forty-six".