65640010051 has 8 divisors (see below), whose sum is σ = 81836895744. Its totient is φ = 51148059720.

The previous prime is 65640010039. The next prime is 65640010097. The reversal of 65640010051 is 15001004656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65640010051 - 2¹⁷ = 65639878979 is a prime.

It is a super-2 number, since 2×65640010051² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65640010001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426233755 + ... + 426233908.

It is an arithmetic number, because the mean of its divisors is an integer number (10229611968).

Almost surely, 2^65640010051 is an apocalyptic number.

65640010051 is a deficient number, since it is larger than the sum of its proper divisors (16196885693).

65640010051 is a wasteful number, since it uses less digits than its factorization.

65640010051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852467681.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 65640010051 in words is "sixty-five billion, six hundred forty million, ten thousand, fifty-one".