64473536781772 has 24 divisors (see below), whose sum is σ = 116831672193600. Its totient is φ = 31095198790656.

The previous prime is 64473536781769. The next prime is 64473536781827. The reversal of 64473536781772 is 27718763537446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267351253 + ... + 267592300.

It is an arithmetic number, because the mean of its divisors is an integer number (4867986341400).

Almost surely, 2^{64473536781772} is an apocalyptic number.

It is an amenable number.

64473536781772 is a deficient number, since it is larger than the sum of its proper divisors (52358135411828).

64473536781772 is a wasteful number, since it uses less digits than its factorization.

64473536781772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534944625 (or 534944623 counting only the distinct ones).

The product of its digits is 995742720, while the sum is 70.

The spelling of 64473536781772 in words is "sixty-four trillion, four hundred seventy-three billion, five hundred thirty-six million, seven hundred eighty-one thousand, seven hundred seventy-two".