51416286774251 has 4 divisors (see below), whose sum is σ = 58761470599152. Its totient is φ = 44071102949352.

The previous prime is 51416286774247. The next prime is 51416286774263. The reversal of 51416286774251 is 15247768261415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51416286774251 - 2² = 51416286774247 is a prime.

It is a super-2 number, since 2×51416286774251² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51416286774451) 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, 3672591912440 + ... + 3672591912453.

It is an arithmetic number, because the mean of its divisors is an integer number (14690367649788).

Almost surely, 2^{51416286774251} is an apocalyptic number.

51416286774251 is a deficient number, since it is larger than the sum of its proper divisors (7345183824901).

51416286774251 is an equidigital number, since it uses as much as digits as its factorization.

51416286774251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7345183824900.

The product of its digits is 22579200, while the sum is 59.

The spelling of 51416286774251 in words is "fifty-one trillion, four hundred sixteen billion, two hundred eighty-six million, seven hundred seventy-four thousand, two hundred fifty-one".