65615457012 has 24 divisors (see below), whose sum is σ = 174974552256. Its totient is φ = 18747273408.

The previous prime is 65615457007. The next prime is 65615457013. The reversal of 65615457012 is 21075451656.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65615457013) 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, 390568113 + ... + 390568280.

It is an arithmetic number, because the mean of its divisors is an integer number (7290606344).

Almost surely, 2^65615457012 is an apocalyptic number.

It is an amenable number.

65615457012 is an abundant number, since it is smaller than the sum of its proper divisors (109359095244).

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

65615457012 is a wasteful number, since it uses less digits than its factorization.

65615457012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781136407 (or 781136405 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 42.

The spelling of 65615457012 in words is "sixty-five billion, six hundred fifteen million, four hundred fifty-seven thousand, twelve".