51193740312 has 128 divisors (see below), whose sum is σ = 167065920000. Its totient is φ = 14319918720.

The previous prime is 51193740307. The next prime is 51193740317. The reversal of 51193740312 is 21304739115.

51193740312 is a `hidden beast` number, since 51 + 193 + 7 + 403 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (51193740307) and next prime (51193740317).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51193740317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 797812 + ... + 859587.

It is an arithmetic number, because the mean of its divisors is an integer number (1305202500).

Almost surely, 2^51193740312 is an apocalyptic number.

51193740312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51193740312 is an abundant number, since it is smaller than the sum of its proper divisors (115872179688).

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

51193740312 is a wasteful number, since it uses less digits than its factorization.

51193740312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657438 (or 1657428 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 51193740312 in words is "fifty-one billion, one hundred ninety-three million, seven hundred forty thousand, three hundred twelve".