64470069261 has 28 divisors (see below), whose sum is σ = 104096353788. Its totient is φ = 39673882944.

The previous prime is 64470069259. The next prime is 64470069271. The reversal of 64470069261 is 16296007446.

64470069261 is a `hidden beast` number, since 64 + 470 + 0 + 69 + 2 + 61 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 36717841161 + 27752228100 = 191619^2 + 166590^2 .

It is not a de Polignac number, because 64470069261 - 2¹ = 64470069259 is a prime.

It is a super-2 number, since 2×64470069261² (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 (64470069271) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3391920 + ... + 3410873.

It is an arithmetic number, because the mean of its divisors is an integer number (3717726921).

Almost surely, 2^64470069261 is an apocalyptic number.

It is an amenable number.

64470069261 is a deficient number, since it is larger than the sum of its proper divisors (39626284527).

64470069261 is an equidigital number, since it uses as much as digits as its factorization.

64470069261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6802824 (or 6802809 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 64470069261 in words is "sixty-four billion, four hundred seventy million, sixty-nine thousand, two hundred sixty-one".