51427993155 has 64 divisors (see below), whose sum is σ = 104270754816. Its totient is φ = 21022272000.

The previous prime is 51427993147. The next prime is 51427993229. The reversal of 51427993155 is 55139972415.

It is not a de Polignac number, because 51427993155 - 2³ = 51427993147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51427993098 and 51427993107.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 294516 + ... + 435425.

It is an arithmetic number, because the mean of its divisors is an integer number (1629230544).

Almost surely, 2^51427993155 is an apocalyptic number.

51427993155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51427993155 is an abundant number, since it is smaller than the sum of its proper divisors (52842761661).

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

51427993155 is a wasteful number, since it uses less digits than its factorization.

51427993155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730028.

The product of its digits is 1701000, while the sum is 51.

The spelling of 51427993155 in words is "fifty-one billion, four hundred twenty-seven million, nine hundred ninety-three thousand, one hundred fifty-five".