61525577 has 4 divisors (see below), whose sum is σ = 61541376. Its totient is φ = 61509780.

The previous prime is 61525537. The next prime is 61525589. The reversal of 61525577 is 77552516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61525577 - 2¹⁴ = 61509193 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61525577.

It is not an unprimeable number, because it can be changed into a prime (61525507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2552 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (15385344).

Almost surely, 2^61525577 is an apocalyptic number.

It is an amenable number.

61525577 is a deficient number, since it is larger than the sum of its proper divisors (15799).

61525577 is an equidigital number, since it uses as much as digits as its factorization.

61525577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798.

The product of its digits is 73500, while the sum is 38.

The square root of 61525577 is about 7843.8241311238. The cubic root of 61525577 is about 394.7770509195. Note that the first 3 decimals are identical.

The spelling of 61525577 in words is "sixty-one million, five hundred twenty-five thousand, five hundred seventy-seven".