77561094 has 64 divisors (see below), whose sum is σ = 173859840. Its totient is φ = 22913280.

The previous prime is 77561063. The next prime is 77561119. The reversal of 77561094 is 49016577.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 252489 + ... + 252795.

It is an arithmetic number, because the mean of its divisors is an integer number (2716560).

Almost surely, 2^77561094 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77561094, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86929920).

77561094 is an abundant number, since it is smaller than the sum of its proper divisors (96298746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77561094 is a wasteful number, since it uses less digits than its factorization.

77561094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 77561094 is about 8806.8776532889. The cubic root of 77561094 is about 426.4629519313.

The spelling of 77561094 in words is "seventy-seven million, five hundred sixty-one thousand, ninety-four".