77252446641121 has 8 divisors (see below), whose sum is σ = 77817059301384. Its totient is φ = 76687844505600.

The previous prime is 77252446641119. The next prime is 77252446641169. The reversal of 77252446641121 is 12114664425277.

It can be written as a sum of positive squares in 4 ways, for example, as 8302258500496 + 68950188140625 = 2881364^2 + 8303625^2 .

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 77252446641121 - 2¹ = 77252446641119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77252446641191) 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, 12415921 + ... + 17568721.

It is an arithmetic number, because the mean of its divisors is an integer number (9727132412673).

Almost surely, 2^{77252446641121} is an apocalyptic number.

It is an amenable number.

77252446641121 is a deficient number, since it is larger than the sum of its proper divisors (564612660263).

77252446641121 is a wasteful number, since it uses less digits than its factorization.

77252446641121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262371.

The product of its digits is 4515840, while the sum is 52.

The spelling of 77252446641121 in words is "seventy-seven trillion, two hundred fifty-two billion, four hundred forty-six million, six hundred forty-one thousand, one hundred twenty-one".