291169962272 has 54 divisors (see below), whose sum is σ = 666880146387. Its totient is φ = 124777969344.

The previous prime is 291169962247. The next prime is 291169962289. The reversal of 291169962272 is 272269961192.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 145584981136 + 145584981136 = 381556^2 + 381556^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=381556.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21360323 + ... + 21373949.

Almost surely, 2^291169962272 is an apocalyptic number.

It is an amenable number.

291169962272 is an abundant number, since it is smaller than the sum of its proper divisors (375710184115).

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

291169962272 is an frugal number, since it uses more digits than its factorization.

291169962272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27278 (or 13636 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 56.

The spelling of 291169962272 in words is "two hundred ninety-one billion, one hundred sixty-nine million, nine hundred sixty-two thousand, two hundred seventy-two".