65378064631 has 8 divisors (see below), whose sum is σ = 71328372624. Its totient is φ = 59428897920.

The previous prime is 65378064629. The next prime is 65378064679. The reversal of 65378064631 is 13646087356.

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 65378064631 - 2¹ = 65378064629 is a prime.

It is a super-2 number, since 2×65378064631² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65378004631) 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, 163266 + ... + 396751.

It is an arithmetic number, because the mean of its divisors is an integer number (8916046578).

Almost surely, 2^65378064631 is an apocalyptic number.

65378064631 is a deficient number, since it is larger than the sum of its proper divisors (5950307993).

65378064631 is a wasteful number, since it uses less digits than its factorization.

65378064631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570641.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 65378064631 in words is "sixty-five billion, three hundred seventy-eight million, sixty-four thousand, six hundred thirty-one".