61506625 has 8 divisors (see below), whose sum is σ = 76760424. Its totient is φ = 49205200.

The previous prime is 61506619. The next prime is 61506673. The reversal of 61506625 is 52660516.

It can be written as a sum of positive squares in 4 ways, for example, as 17363889 + 44142736 = 4167^2 + 6644^2 .

It is not a de Polignac number, because 61506625 - 2¹⁵ = 61473857 is a prime.

It is a Duffinian number.

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, 245902 + ... + 246151.

It is an arithmetic number, because the mean of its divisors is an integer number (9595053).

Almost surely, 2^61506625 is an apocalyptic number.

It is an amenable number.

61506625 is a deficient number, since it is larger than the sum of its proper divisors (15253799).

61506625 is an equidigital number, since it uses as much as digits as its factorization.

61506625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492068 (or 492058 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 61506625 is about 7842.6159538766. The cubic root of 61506625 is about 394.7365117736.

The spelling of 61506625 in words is "sixty-one million, five hundred six thousand, six hundred twenty-five".