77292320221 has 8 divisors (see below), whose sum is σ = 77670080000. Its totient is φ = 76914910800.

The previous prime is 77292320179. The next prime is 77292320227. The reversal of 77292320221 is 12202329277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77292320221 - 2¹³ = 77292312029 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 (77292320227) 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, 360280 + ... + 533278.

It is an arithmetic number, because the mean of its divisors is an integer number (9708760000).

Almost surely, 2^77292320221 is an apocalyptic number.

It is an amenable number.

77292320221 is a deficient number, since it is larger than the sum of its proper divisors (377759779).

77292320221 is a wasteful number, since it uses less digits than its factorization.

77292320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175179.

The product of its (nonzero) digits is 42336, while the sum is 37.

Adding to 77292320221 its reverse (12202329277), we get a palindrome (89494649498).

The spelling of 77292320221 in words is "seventy-seven billion, two hundred ninety-two million, three hundred twenty thousand, two hundred twenty-one".