77232737570221 has 32 divisors (see below), whose sum is σ = 85390802640000. Its totient is φ = 69523521564672.

The previous prime is 77232737570213. The next prime is 77232737570267. The reversal of 77232737570221 is 12207573723277.

It is a cyclic number.

It is not a de Polignac number, because 77232737570221 - 2³ = 77232737570213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77232737570281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1800317430 + ... + 1800360328.

It is an arithmetic number, because the mean of its divisors is an integer number (2668462582500).

Almost surely, 2^{77232737570221} is an apocalyptic number.

It is an amenable number.

77232737570221 is a deficient number, since it is larger than the sum of its proper divisors (8158065069779).

77232737570221 is a wasteful number, since it uses less digits than its factorization.

77232737570221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77181.

The product of its (nonzero) digits is 12101040, while the sum is 55.

The spelling of 77232737570221 in words is "seventy-seven trillion, two hundred thirty-two billion, seven hundred thirty-seven million, five hundred seventy thousand, two hundred twenty-one".