61578025 has 24 divisors (see below), whose sum is σ = 78501920. Its totient is φ = 47900160.

The previous prime is 61578019. The next prime is 61578043. The reversal of 61578025 is 52087516.

It is not a de Polignac number, because 61578025 - 2⁷ = 61577897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162286 + ... + 162664.

Almost surely, 2^61578025 is an apocalyptic number.

It is an amenable number.

61578025 is a deficient number, since it is larger than the sum of its proper divisors (16923895).

61578025 is a wasteful number, since it uses less digits than its factorization.

61578025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 61578025 is about 7847.1666861358. The cubic root of 61578025 is about 394.8891960744.

The spelling of 61578025 in words is "sixty-one million, five hundred seventy-eight thousand, twenty-five".