51550411660 has 36 divisors (see below), whose sum is σ = 118991988864. Its totient is φ = 18745603360.

The previous prime is 51550411657. The next prime is 51550411663. The reversal of 51550411660 is 6611405515.

It is an interprime number because it is at equal distance from previous prime (51550411657) and next prime (51550411663).

It is not an unprimeable number, because it can be changed into a prime (51550411663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10648492 + ... + 10653331.

It is an arithmetic number, because the mean of its divisors is an integer number (3305333024).

Almost surely, 2^51550411660 is an apocalyptic number.

It is an amenable number.

51550411660 is an abundant number, since it is smaller than the sum of its proper divisors (67441577204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51550411660 is a wasteful number, since it uses less digits than its factorization.

51550411660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21301854 (or 21301841 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 51550411660 in words is "fifty-one billion, five hundred fifty million, four hundred eleven thousand, six hundred sixty".