51115651630 has 32 divisors (see below), whose sum is σ = 92405570400. Its totient is φ = 20358138240.

The previous prime is 51115651579. The next prime is 51115651649. The reversal of 51115651630 is 3615651115.

It is a super-2 number, since 2×51115651630² (a number of 22 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 15 ways as a sum of consecutive naturals, for example, 2255596 + ... + 2278144.

It is an arithmetic number, because the mean of its divisors is an integer number (2887674075).

Almost surely, 2^51115651630 is an apocalyptic number.

51115651630 is a deficient number, since it is larger than the sum of its proper divisors (41289918770).

51115651630 is a wasteful number, since it uses less digits than its factorization.

51115651630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23524.

The product of its (nonzero) digits is 13500, while the sum is 34.

The spelling of 51115651630 in words is "fifty-one billion, one hundred fifteen million, six hundred fifty-one thousand, six hundred thirty".