51525711765 has 32 divisors (see below), whose sum is σ = 99928656000. Its totient is φ = 24982162560.

The previous prime is 51525711763. The next prime is 51525711803. The reversal of 51525711765 is 56711752515.

51525711765 is a `hidden beast` number, since 5 + 1 + 5 + 2 + 571 + 1 + 76 + 5 = 666.

It is not a de Polignac number, because 51525711765 - 2¹ = 51525711763 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 51525711765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51525711763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17347240 + ... + 17350209.

It is an arithmetic number, because the mean of its divisors is an integer number (3122770500).

Almost surely, 2^51525711765 is an apocalyptic number.

51525711765 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51525711765 is a deficient number, since it is larger than the sum of its proper divisors (48402944235).

51525711765 is a wasteful number, since it uses less digits than its factorization.

51525711765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34697474 (or 34697468 counting only the distinct ones).

The product of its digits is 367500, while the sum is 45.

It can be divided in two parts, 51525711 and 765, that added together give a triangular number (51526476 = T₁₀₁₅₁).

The spelling of 51525711765 in words is "fifty-one billion, five hundred twenty-five million, seven hundred eleven thousand, seven hundred sixty-five".