61855025 has 12 divisors (see below), whose sum is σ = 77673600. Its totient is φ = 48856080.

The previous prime is 61855021. The next prime is 61855049. The reversal of 61855025 is 52055816.

It is not a de Polignac number, because 61855025 - 2² = 61855021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61854982 and 61855000.

It is not an unprimeable number, because it can be changed into a prime (61855021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13685 + ... + 17634.

It is an arithmetic number, because the mean of its divisors is an integer number (6472800).

Almost surely, 2^61855025 is an apocalyptic number.

It is an amenable number.

61855025 is a deficient number, since it is larger than the sum of its proper divisors (15818575).

61855025 is a wasteful number, since it uses less digits than its factorization.

61855025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31408 (or 31403 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 61855025 is about 7864.7965644383. The cubic root of 61855025 is about 395.4804280893.

The spelling of 61855025 in words is "sixty-one million, eight hundred fifty-five thousand, twenty-five".