51356423745 has 24 divisors (see below), whose sum is σ = 97110329472. Its totient is φ = 24900084000.

The previous prime is 51356423689. The next prime is 51356423771. The reversal of 51356423745 is 54732465315.

51356423745 is a `hidden beast` number, since 5 + 13 + 564 + 2 + 3 + 74 + 5 = 666.

51356423745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51356423745 - 2⁷ = 51356423617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51356423745.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51874681 + ... + 51875670.

It is an arithmetic number, because the mean of its divisors is an integer number (4046263728).

Almost surely, 2^51356423745 is an apocalyptic number.

51356423745 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51356423745 is a deficient number, since it is larger than the sum of its proper divisors (45753905727).

51356423745 is a wasteful number, since it uses less digits than its factorization.

51356423745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103750373 (or 103750370 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 45.

The spelling of 51356423745 in words is "fifty-one billion, three hundred fifty-six million, four hundred twenty-three thousand, seven hundred forty-five".