64947724828 has 18 divisors (see below), whose sum is σ = 132215011656. Its totient is φ = 27834739128.

The previous prime is 64947724823. The next prime is 64947724843. The reversal of 64947724828 is 82842774946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64947724823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 165682776 + ... + 165683167.

Almost surely, 2^64947724828 is an apocalyptic number.

It is an amenable number.

64947724828 is an abundant number, since it is smaller than the sum of its proper divisors (67267286828).

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

64947724828 is a wasteful number, since it uses less digits than its factorization.

64947724828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331365961 (or 331365952 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 61.

The spelling of 64947724828 in words is "sixty-four billion, nine hundred forty-seven million, seven hundred twenty-four thousand, eight hundred twenty-eight".