51613635641 has 8 divisors (see below), whose sum is σ = 54378804480. Its totient is φ = 48853333008.

The previous prime is 51613635589. The next prime is 51613635643. The reversal of 51613635641 is 14653631615.

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

It is a cyclic number.

It is not a de Polignac number, because 51613635641 - 2²² = 51609441337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51613635643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194761 + ... + 1237206.

It is an arithmetic number, because the mean of its divisors is an integer number (6797350560).

Almost surely, 2^51613635641 is an apocalyptic number.

It is an amenable number.

51613635641 is a deficient number, since it is larger than the sum of its proper divisors (2765168839).

51613635641 is a wasteful number, since it uses less digits than its factorization.

51613635641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2433103.

The product of its digits is 194400, while the sum is 41.

The spelling of 51613635641 in words is "fifty-one billion, six hundred thirteen million, six hundred thirty-five thousand, six hundred forty-one".