64118994859397 has 16 divisors (see below), whose sum is σ = 65167525002240. Its totient is φ = 63080115716352.

The previous prime is 64118994859363. The next prime is 64118994859399. The reversal of 64118994859397 is 79395849981146.

It is a cyclic number.

It is not a de Polignac number, because 64118994859397 - 2¹⁸ = 64118994597253 is a prime.

It is a super-2 number, since 2×64118994859397² (a number of 28 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 (64118994859399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9164504 + ... + 14567982.

It is an arithmetic number, because the mean of its divisors is an integer number (4072970312640).

Almost surely, 2^{64118994859397} is an apocalyptic number.

It is an amenable number.

64118994859397 is a deficient number, since it is larger than the sum of its proper divisors (1048530142843).

64118994859397 is a wasteful number, since it uses less digits than its factorization.

64118994859397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5404372.

The product of its digits is 4232632320, while the sum is 83.

The spelling of 64118994859397 in words is "sixty-four trillion, one hundred eighteen billion, nine hundred ninety-four million, eight hundred fifty-nine thousand, three hundred ninety-seven".