77550474366361 has 16 divisors (see below), whose sum is σ = 82122186960000. Its totient is φ = 73029016941696.

The previous prime is 77550474366317. The next prime is 77550474366401. The reversal of 77550474366361 is 16366347405577.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77550474366361 - 2²⁵ = 77550440811929 is a prime.

It is a super-2 number, since 2×77550474366361² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77550474366293 and 77550474366302.

It is not an unprimeable number, because it can be changed into a prime (77550474366301) 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, 15037876 + ... + 19525333.

It is an arithmetic number, because the mean of its divisors is an integer number (5132636685000).

Almost surely, 2^{77550474366361} is an apocalyptic number.

It is an amenable number.

77550474366361 is a deficient number, since it is larger than the sum of its proper divisors (4571712593639).

77550474366361 is a wasteful number, since it uses less digits than its factorization.

77550474366361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34563936.

The product of its (nonzero) digits is 266716800, while the sum is 64.

The spelling of 77550474366361 in words is "seventy-seven trillion, five hundred fifty billion, four hundred seventy-four million, three hundred sixty-six thousand, three hundred sixty-one".