51132379194 has 32 divisors (see below), whose sum is σ = 122368088640. Its totient is φ = 15733039536.

The previous prime is 51132379147. The next prime is 51132379231. The reversal of 51132379194 is 49197323115.

It is a super-2 number, since 2×51132379194² (a number of 22 digits) contains 22 as substring.

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, 36418372 + ... + 36419775.

It is an arithmetic number, because the mean of its divisors is an integer number (3824002770).

Almost surely, 2^51132379194 is an apocalyptic number.

51132379194 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

51132379194 is an abundant number, since it is smaller than the sum of its proper divisors (71235709446).

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

51132379194 is a wasteful number, since it uses less digits than its factorization.

51132379194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72838171 (or 72838165 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The spelling of 51132379194 in words is "fifty-one billion, one hundred thirty-two million, three hundred seventy-nine thousand, one hundred ninety-four".