64398117270 has 32 divisors (see below), whose sum is σ = 156672685152. Its totient is φ = 16937586432.

The previous prime is 64398117263. The next prime is 64398117271. The reversal of 64398117270 is 7271189346.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64398117271) 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, 14700577 + ... + 14704956.

It is an arithmetic number, because the mean of its divisors is an integer number (4896021411).

Almost surely, 2^64398117270 is an apocalyptic number.

64398117270 is an abundant number, since it is smaller than the sum of its proper divisors (92274567882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64398117270 is a wasteful number, since it uses less digits than its factorization.

64398117270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29405616.

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 64398117270 in words is "sixty-four billion, three hundred ninety-eight million, one hundred seventeen thousand, two hundred seventy".