65531762809972 has 48 divisors (see below), whose sum is σ = 118282969413504. Its totient is φ = 31747682880000.

The previous prime is 65531762809897. The next prime is 65531762809987. The reversal of 65531762809972 is 27990826713556.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107742072 + ... + 108348592.

It is an arithmetic number, because the mean of its divisors is an integer number (2464228529448).

Almost surely, 2^{65531762809972} is an apocalyptic number.

It is an amenable number.

65531762809972 is a deficient number, since it is larger than the sum of its proper divisors (52751206603532).

65531762809972 is a wasteful number, since it uses less digits than its factorization.

65531762809972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611080 (or 611078 counting only the distinct ones).

The product of its (nonzero) digits is 342921600, while the sum is 70.

The spelling of 65531762809972 in words is "sixty-five trillion, five hundred thirty-one billion, seven hundred sixty-two million, eight hundred nine thousand, nine hundred seventy-two".