7561656672 has 24 divisors (see below), whose sum is σ = 19849349016. Its totient is φ = 2520552192.

The previous prime is 7561656659. The next prime is 7561656677. The reversal of 7561656672 is 2766561657.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7561656677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39383533 + ... + 39383724.

It is an arithmetic number, because the mean of its divisors is an integer number (827056209).

Almost surely, 2^7561656672 is an apocalyptic number.

It is an amenable number.

7561656672 is an abundant number, since it is smaller than the sum of its proper divisors (12287692344).

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

7561656672 is a wasteful number, since it uses less digits than its factorization.

7561656672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78767270 (or 78767262 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 51.

The square root of 7561656672 is about 86957.7867243641. The cubic root of 7561656672 is about 1962.7831376522.

The spelling of 7561656672 in words is "seven billion, five hundred sixty-one million, six hundred fifty-six thousand, six hundred seventy-two".