61577130 has 32 divisors (see below), whose sum is σ = 148002624. Its totient is φ = 16396416.

The previous prime is 61577123. The next prime is 61577143. The reversal of 61577130 is 3177516.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29997 + ... + 31983.

It is an arithmetic number, because the mean of its divisors is an integer number (4625082).

Almost surely, 2^61577130 is an apocalyptic number.

61577130 is an abundant number, since it is smaller than the sum of its proper divisors (86425494).

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

61577130 is a wasteful number, since it uses less digits than its factorization.

61577130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030.

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

The square root of 61577130 is about 7847.1096589764. The cubic root of 61577130 is about 394.8872829052.

The spelling of 61577130 in words is "sixty-one million, five hundred seventy-seven thousand, one hundred thirty".