77454422445477 has 64 divisors (see below), whose sum is σ = 130576323870720. Its totient is φ = 39667090814400.

The previous prime is 77454422445451. The next prime is 77454422445539.

77454422445477 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 77454422445477 - 2⁸ = 77454422445221 is a prime.

It is a super-2 number, since 2×77454422445477² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77454422446477) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 308262424 + ... + 308513582.

It is an arithmetic number, because the mean of its divisors is an integer number (2040255060480).

Almost surely, 2^{77454422445477} is an apocalyptic number.

77454422445477 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

It is an amenable number.

77454422445477 is a deficient number, since it is larger than the sum of its proper divisors (53121901425243).

77454422445477 is a wasteful number, since it uses less digits than its factorization.

77454422445477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270054.

The product of its digits is 983449600, while the sum is 66.

The spelling of 77454422445477 in words is "seventy-seven trillion, four hundred fifty-four billion, four hundred twenty-two million, four hundred forty-five thousand, four hundred seventy-seven".