64473994734 has 32 divisors (see below), whose sum is σ = 131806642176. Its totient is φ = 21015688800.

The previous prime is 64473994733. The next prime is 64473994787. The reversal of 64473994734 is 43749937446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64473994733) 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, 225264 + ... + 423900.

It is an arithmetic number, because the mean of its divisors is an integer number (4118957568).

Almost surely, 2^64473994734 is an apocalyptic number.

64473994734 is an abundant number, since it is smaller than the sum of its proper divisors (67332647442).

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

64473994734 is a wasteful number, since it uses less digits than its factorization.

64473994734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199840.

The product of its digits is 54867456, while the sum is 60.

The spelling of 64473994734 in words is "sixty-four billion, four hundred seventy-three million, nine hundred ninety-four thousand, seven hundred thirty-four".