65724185972 has 24 divisors (see below), whose sum is σ = 115418030784. Its totient is φ = 32747720832.

The previous prime is 65724185957. The next prime is 65724185981. The reversal of 65724185972 is 27958142756.

It is a congruent number.

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, 2453153 + ... + 2479799.

It is an arithmetic number, because the mean of its divisors is an integer number (4809084616).

Almost surely, 2^65724185972 is an apocalyptic number.

It is an amenable number.

65724185972 is a deficient number, since it is larger than the sum of its proper divisors (49693844812).

65724185972 is a wasteful number, since it uses less digits than its factorization.

65724185972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28775 (or 28773 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 56.

The spelling of 65724185972 in words is "sixty-five billion, seven hundred twenty-four million, one hundred eighty-five thousand, nine hundred seventy-two".