77627747172721 has 8 divisors (see below), whose sum is σ = 79097470838784. Its totient is φ = 76158210513840.

The previous prime is 77627747172673. The next prime is 77627747172727. The reversal of 77627747172721 is 12727174772677.

It is a happy number.

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 77627747172721 - 2²⁵ = 77627713618289 is a prime.

It is a super-2 number, since 2×77627747172721² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77627747172727) 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, 45913585 + ... + 47574286.

It is an arithmetic number, because the mean of its divisors is an integer number (9887183854848).

Almost surely, 2^{77627747172721} is an apocalyptic number.

It is an amenable number.

77627747172721 is a deficient number, since it is larger than the sum of its proper divisors (1469723666063).

77627747172721 is a wasteful number, since it uses less digits than its factorization.

77627747172721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93503591.

The product of its digits is 158120256, while the sum is 67.

The spelling of 77627747172721 in words is "seventy-seven trillion, six hundred twenty-seven billion, seven hundred forty-seven million, one hundred seventy-two thousand, seven hundred twenty-one".