64402782717 has 32 divisors (see below), whose sum is σ = 111249080320. Its totient is φ = 32182764480.

The previous prime is 64402782707. The next prime is 64402782749. The reversal of 64402782717 is 71728720446.

It is not a de Polignac number, because 64402782717 - 2⁷ = 64402782589 is a prime.

It is a super-2 number, since 2×64402782717² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64402782707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6202909 + ... + 6213282.

It is an arithmetic number, because the mean of its divisors is an integer number (3476533760).

Almost surely, 2^64402782717 is an apocalyptic number.

It is an amenable number.

64402782717 is a deficient number, since it is larger than the sum of its proper divisors (46846297603).

64402782717 is a wasteful number, since it uses less digits than its factorization.

64402782717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12416233.

The product of its (nonzero) digits is 1053696, while the sum is 48.

The spelling of 64402782717 in words is "sixty-four billion, four hundred two million, seven hundred eighty-two thousand, seven hundred seventeen".