77111145 has 48 divisors (see below), whose sum is σ = 142094160. Its totient is φ = 38610432.

The previous prime is 77111123. The next prime is 77111149. The reversal of 77111145 is 54111177.

It can be written as a sum of positive squares in 8 ways, for example, as 5184 + 77105961 = 72^2 + 8781^2 .

It is not a de Polignac number, because 77111145 - 2¹² = 77107049 is a prime.

It is a super-2 number, since 2×77111145² = 11892257366422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77111149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47487 + ... + 49083.

It is an arithmetic number, because the mean of its divisors is an integer number (2960295).

Almost surely, 2^77111145 is an apocalyptic number.

It is an amenable number.

77111145 is a deficient number, since it is larger than the sum of its proper divisors (64983015).

77111145 is a wasteful number, since it uses less digits than its factorization.

77111145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1671 counting only the distinct ones).

The product of its digits is 980, while the sum is 27.

The square root of 77111145 is about 8781.2951778197. The cubic root of 77111145 is about 425.6366835531.

The spelling of 77111145 in words is "seventy-seven million, one hundred eleven thousand, one hundred forty-five".