77561103 has 16 divisors (see below), whose sum is σ = 105098336. Its totient is φ = 50872320.

The previous prime is 77561063. The next prime is 77561119. The reversal of 77561103 is 30116577.

It is not a de Polignac number, because 77561103 - 2⁹ = 77560591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77561153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55473 + ... + 56853.

It is an arithmetic number, because the mean of its divisors is an integer number (6568646).

Almost surely, 2^77561103 is an apocalyptic number.

77561103 is a deficient number, since it is larger than the sum of its proper divisors (27537233).

77561103 is a wasteful number, since it uses less digits than its factorization.

77561103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 77561103 is about 8806.8781642532. The cubic root of 77561103 is about 426.4629684266.

The spelling of 77561103 in words is "seventy-seven million, five hundred sixty-one thousand, one hundred three".