51340353835765 has 24 divisors (see below), whose sum is σ = 63665536084920. Its totient is φ = 39743852837760.

The previous prime is 51340353835759. The next prime is 51340353835769. The reversal of 51340353835765 is 56753835304315.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2217651115684 + 49122702720081 = 1489178^2 + 7008759^2 .

It is not a de Polignac number, because 51340353835765 - 2²⁵ = 51340320281333 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51340353835769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54487671 + ... + 55421899.

It is an arithmetic number, because the mean of its divisors is an integer number (2652730670205).

Almost surely, 2^{51340353835765} is an apocalyptic number.

It is an amenable number.

51340353835765 is a deficient number, since it is larger than the sum of its proper divisors (12325182249155).

51340353835765 is a wasteful number, since it uses less digits than its factorization.

51340353835765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945733 (or 945702 counting only the distinct ones).

The product of its (nonzero) digits is 68040000, while the sum is 58.

The spelling of 51340353835765 in words is "fifty-one trillion, three hundred forty billion, three hundred fifty-three million, eight hundred thirty-five thousand, seven hundred sixty-five".