65115700120 has 32 divisors (see below), whose sum is σ = 148156516800. Its totient is φ = 25753623808.

The previous prime is 65115700099. The next prime is 65115700121. The reversal of 65115700120 is 2100751156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65115700121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9141904 + ... + 9149023.

It is an arithmetic number, because the mean of its divisors is an integer number (4629891150).

Almost surely, 2^65115700120 is an apocalyptic number.

It is an amenable number.

65115700120 is an abundant number, since it is smaller than the sum of its proper divisors (83040816680).

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

65115700120 is a wasteful number, since it uses less digits than its factorization.

65115700120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18291027 (or 18291023 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The spelling of 65115700120 in words is "sixty-five billion, one hundred fifteen million, seven hundred thousand, one hundred twenty".