40561625 has 32 divisors (see below), whose sum is σ = 55255200. Its totient is φ = 29548800.

The previous prime is 40561607. The next prime is 40561639. The reversal of 40561625 is 52616504.

It can be written as a sum of positive squares in 16 ways, for example, as 22174681 + 18386944 = 4709^2 + 4288^2 .

It is not a de Polignac number, because 40561625 - 2¹⁰ = 40560601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177011 + ... + 177239.

It is an arithmetic number, because the mean of its divisors is an integer number (1726725).

Almost surely, 2^40561625 is an apocalyptic number.

It is an amenable number.

40561625 is a deficient number, since it is larger than the sum of its proper divisors (14693575).

40561625 is a wasteful number, since it uses less digits than its factorization.

40561625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 40561625 is about 6368.8009075492. The cubic root of 40561625 is about 343.5883647805.

The spelling of 40561625 in words is "forty million, five hundred sixty-one thousand, six hundred twenty-five".