65940978125 has 24 divisors (see below), whose sum is σ = 89913807648. Its totient is φ = 47957050000.

The previous prime is 65940978119. The next prime is 65940978133. The reversal of 65940978125 is 52187904956.

It is not a de Polignac number, because 65940978125 - 2¹⁰ = 65940977101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 924767 + ... + 993516.

It is an arithmetic number, because the mean of its divisors is an integer number (3746408652).

Almost surely, 2^65940978125 is an apocalyptic number.

It is an amenable number.

65940978125 is a deficient number, since it is larger than the sum of its proper divisors (23972829523).

65940978125 is an equidigital number, since it uses as much as digits as its factorization.

65940978125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918319 (or 1918299 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 65940978125 in words is "sixty-five billion, nine hundred forty million, nine hundred seventy-eight thousand, one hundred twenty-five".