76561401211021 has 16 divisors (see below), whose sum is σ = 81649173299200. Its totient is φ = 71580308527728.

The previous prime is 76561401211019. The next prime is 76561401211033. The reversal of 76561401211021 is 12011210416567.

It is a cyclic number.

It is not a de Polignac number, because 76561401211021 - 2¹ = 76561401211019 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 (76561401215021) 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, 8684181 + ... + 15117466.

It is an arithmetic number, because the mean of its divisors is an integer number (5103073331200).

Almost surely, 2^{76561401211021} is an apocalyptic number.

It is an amenable number.

76561401211021 is a deficient number, since it is larger than the sum of its proper divisors (5087772088179).

76561401211021 is a wasteful number, since it uses less digits than its factorization.

76561401211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23803888.

The product of its (nonzero) digits is 20160, while the sum is 37.

Adding to 76561401211021 its reverse (12011210416567), we get a palindrome (88572611627588).

The spelling of 76561401211021 in words is "seventy-six trillion, five hundred sixty-one billion, four hundred one million, two hundred eleven thousand, twenty-one".