51166551550 has 24 divisors (see below), whose sum is σ = 100768010256. Its totient is φ = 19262701440.

The previous prime is 51166551523. The next prime is 51166551587. The reversal of 51166551550 is 5515566115.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30097122 + ... + 30098821.

It is an arithmetic number, because the mean of its divisors is an integer number (4198667094).

Almost surely, 2^51166551550 is an apocalyptic number.

51166551550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51166551550 is a deficient number, since it is larger than the sum of its proper divisors (49601458706).

51166551550 is a wasteful number, since it uses less digits than its factorization.

51166551550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60195972 (or 60195967 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 51166551550 in words is "fifty-one billion, one hundred sixty-six million, five hundred fifty-one thousand, five hundred fifty".