61577653 has 2 divisors, whose sum is σ = 61577654. Its totient is φ = 61577652.

The previous prime is 61577603. The next prime is 61577671. The reversal of 61577653 is 35677516.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56881764 + 4695889 = 7542^2 + 2167^2 .

It is a cyclic number.

It is not a de Polignac number, because 61577653 - 2²⁵ = 28023221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61577603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30788826 + 30788827.

It is an arithmetic number, because the mean of its divisors is an integer number (30788827).

Almost surely, 2^61577653 is an apocalyptic number.

It is an amenable number.

61577653 is a deficient number, since it is larger than the sum of its proper divisors (1).

61577653 is an equidigital number, since it uses as much as digits as its factorization.

61577653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 40.

The square root of 61577653 is about 7847.1429832774. The cubic root of 61577653 is about 394.8884008823. Note that the first 3 decimals are identical.

The spelling of 61577653 in words is "sixty-one million, five hundred seventy-seven thousand, six hundred fifty-three".