7721561006367 has 16 divisors (see below), whose sum is σ = 11090686430208. Its totient is φ = 4750308372960.

The previous prime is 7721561006363. The next prime is 7721561006389. The reversal of 7721561006367 is 7636001651277.

It is not a de Polignac number, because 7721561006367 - 2² = 7721561006363 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7721561006363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29482059 + ... + 29742812.

It is an arithmetic number, because the mean of its divisors is an integer number (693167901888).

Almost surely, 2^{7721561006367} is an apocalyptic number.

7721561006367 is a deficient number, since it is larger than the sum of its proper divisors (3369125423841).

7721561006367 is a wasteful number, since it uses less digits than its factorization.

7721561006367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59228230.

The product of its (nonzero) digits is 2222640, while the sum is 51.

The spelling of 7721561006367 in words is "seven trillion, seven hundred twenty-one billion, five hundred sixty-one million, six thousand, three hundred sixty-seven".