64398063745 has 32 divisors (see below), whose sum is σ = 83282264064. Its totient is φ = 47663985600.

The previous prime is 64398063731. The next prime is 64398063757. The reversal of 64398063745 is 54736089346.

It is not a de Polignac number, because 64398063745 - 2⁵ = 64398063713 is a prime.

It is a super-2 number, since 2×64398063745² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9518734 + ... + 9525496.

It is an arithmetic number, because the mean of its divisors is an integer number (2602570752).

Almost surely, 2^64398063745 is an apocalyptic number.

It is an amenable number.

64398063745 is a deficient number, since it is larger than the sum of its proper divisors (18884200319).

64398063745 is a wasteful number, since it uses less digits than its factorization.

64398063745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 64398063745 in words is "sixty-four billion, three hundred ninety-eight million, sixty-three thousand, seven hundred forty-five".