61437825 has 24 divisors (see below), whose sum is σ = 112864800. Its totient is φ = 32766480.

The previous prime is 61437809. The next prime is 61437829. The reversal of 61437825 is 52873416.

61437825 is a `hidden beast` number, since 614 + 37 + 8 + 2 + 5 = 666.

It is not a de Polignac number, because 61437825 - 2⁴ = 61437809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61437825.

It is not an unprimeable number, because it can be changed into a prime (61437829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44835 + ... + 46184.

It is an arithmetic number, because the mean of its divisors is an integer number (4702700).

Almost surely, 2^61437825 is an apocalyptic number.

It is an amenable number.

61437825 is a deficient number, since it is larger than the sum of its proper divisors (51426975).

61437825 is a wasteful number, since it uses less digits than its factorization.

61437825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91038 (or 91027 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 61437825 is about 7838.2284350483. The cubic root of 61437825 is about 394.5892755782.

The spelling of 61437825 in words is "sixty-one million, four hundred thirty-seven thousand, eight hundred twenty-five".