51455121763 has 4 divisors (see below), whose sum is σ = 51455659528. Its totient is φ = 51454584000.

The previous prime is 51455121703. The next prime is 51455121769. The reversal of 51455121763 is 36712155415.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51455121763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51455121769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82113 + ... + 331138.

It is an arithmetic number, because the mean of its divisors is an integer number (12863914882).

Almost surely, 2^51455121763 is an apocalyptic number.

51455121763 is a deficient number, since it is larger than the sum of its proper divisors (537765).

51455121763 is a wasteful number, since it uses less digits than its factorization.

51455121763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537764.

The product of its digits is 126000, while the sum is 40.

The spelling of 51455121763 in words is "fifty-one billion, four hundred fifty-five million, one hundred twenty-one thousand, seven hundred sixty-three".