64474172266 has 12 divisors (see below), whose sum is σ = 112500851778. Its totient is φ = 27631788072.

The previous prime is 64474172249. The next prime is 64474172299. The reversal of 64474172266 is 66227147446.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 59351191641 + 5122980625 = 243621^2 + 71575^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 328949761 + ... + 328949956.

Almost surely, 2^64474172266 is an apocalyptic number.

64474172266 is a deficient number, since it is larger than the sum of its proper divisors (48026679512).

64474172266 is a wasteful number, since it uses less digits than its factorization.

64474172266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657899733 (or 657899726 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 49.

The spelling of 64474172266 in words is "sixty-four billion, four hundred seventy-four million, one hundred seventy-two thousand, two hundred sixty-six".