65728633939 has 8 divisors (see below), whose sum is σ = 69007180032. Its totient is φ = 62485152840.

The previous prime is 65728633913. The next prime is 65728633981. The reversal of 65728633939 is 93933682756.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65728633939 - 2⁷ = 65728633811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65728633339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8762407 + ... + 8769904.

It is an arithmetic number, because the mean of its divisors is an integer number (8625897504).

Almost surely, 2^65728633939 is an apocalyptic number.

65728633939 is a deficient number, since it is larger than the sum of its proper divisors (3278546093).

65728633939 is a wasteful number, since it uses less digits than its factorization.

65728633939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17532497.

The product of its digits is 44089920, while the sum is 61.

The spelling of 65728633939 in words is "sixty-five billion, seven hundred twenty-eight million, six hundred thirty-three thousand, nine hundred thirty-nine".