61057778 has 16 divisors (see below), whose sum is σ = 101191680. Its totient is φ = 27483456.

The previous prime is 61057769. The next prime is 61057793. The reversal of 61057778 is 87775016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38258 + ... + 39821.

It is an arithmetic number, because the mean of its divisors is an integer number (6324480).

Almost surely, 2^61057778 is an apocalyptic number.

61057778 is a deficient number, since it is larger than the sum of its proper divisors (40133902).

61057778 is a wasteful number, since it uses less digits than its factorization.

61057778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78121.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 61057778 is about 7813.9476578743. The cubic root of 61057778 is about 393.7739648469.

The spelling of 61057778 in words is "sixty-one million, fifty-seven thousand, seven hundred seventy-eight".