77122145377 has 16 divisors (see below), whose sum is σ = 81979571520. Its totient is φ = 72346996800.

The previous prime is 77122145357. The next prime is 77122145461. The reversal of 77122145377 is 77354122177.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77122145377 is a prime.

It is a super-2 number, since 2×77122145377² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77122145357) 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, 1113823 + ... + 1181035.

It is an arithmetic number, because the mean of its divisors is an integer number (5123723220).

Almost surely, 2^77122145377 is an apocalyptic number.

It is an amenable number.

77122145377 is a deficient number, since it is larger than the sum of its proper divisors (4857426143).

77122145377 is a wasteful number, since it uses less digits than its factorization.

77122145377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67824.

The product of its digits is 576240, while the sum is 46.

The spelling of 77122145377 in words is "seventy-seven billion, one hundred twenty-two million, one hundred forty-five thousand, three hundred seventy-seven".