61639485 has 16 divisors (see below), whose sum is σ = 98900736. Its totient is φ = 32781888.

The previous prime is 61639453. The next prime is 61639489. The reversal of 61639485 is 58493616.

It is not a de Polignac number, because 61639485 - 2⁵ = 61639453 is a prime.

It is a super-2 number, since 2×61639485² = 7598852222130450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61639489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94 + ... + 11103.

It is an arithmetic number, because the mean of its divisors is an integer number (6181296).

Almost surely, 2^61639485 is an apocalyptic number.

It is an amenable number.

61639485 is a deficient number, since it is larger than the sum of its proper divisors (37261251).

61639485 is a wasteful number, since it uses less digits than its factorization.

61639485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11572.

The product of its digits is 155520, while the sum is 42.

The square root of 61639485 is about 7851.0817725967. The cubic root of 61639485 is about 395.0205298308.

The spelling of 61639485 in words is "sixty-one million, six hundred thirty-nine thousand, four hundred eighty-five".