77476655321 has 16 divisors (see below), whose sum is σ = 88418283408. Its totient is φ = 67253760000.

The previous prime is 77476655293. The next prime is 77476655323. The reversal of 77476655321 is 12355667477.

It can be written as a sum of positive squares in 8 ways, for example, as 25691281225 + 51785374096 = 160285^2 + 227564^2 .

It is a cyclic number.

It is not a de Polignac number, because 77476655321 - 2²⁶ = 77409546457 is a prime.

It is a super-2 number, since 2×77476655321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77476655323) 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, 119471 + ... + 411371.

It is an arithmetic number, because the mean of its divisors is an integer number (5526142713).

Almost surely, 2^77476655321 is an apocalyptic number.

It is an amenable number.

77476655321 is a deficient number, since it is larger than the sum of its proper divisors (10941628087).

77476655321 is a wasteful number, since it uses less digits than its factorization.

77476655321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293132.

The product of its digits is 7408800, while the sum is 53.

The spelling of 77476655321 in words is "seventy-seven billion, four hundred seventy-six million, six hundred fifty-five thousand, three hundred twenty-one".