77381055 has 32 divisors (see below), whose sum is σ = 137937600. Its totient is φ = 41158656.

The previous prime is 77381027. The next prime is 77381081. The reversal of 77381055 is 55018377.

It is not a de Polignac number, because 77381055 - 2⁹ = 77380543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82831 + ... + 83759.

It is an arithmetic number, because the mean of its divisors is an integer number (4310550).

Almost surely, 2^77381055 is an apocalyptic number.

77381055 is a deficient number, since it is larger than the sum of its proper divisors (60556545).

77381055 is a wasteful number, since it uses less digits than its factorization.

77381055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 77381055 is about 8796.6502147124. The cubic root of 77381055 is about 426.1327200038.

The spelling of 77381055 in words is "seventy-seven million, three hundred eighty-one thousand, fifty-five".