61135590 has 16 divisors (see below), whose sum is σ = 146725488. Its totient is φ = 16302816.

The previous prime is 61135589. The next prime is 61135631. The reversal of 61135590 is 9553116.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2037853 = 61135590 / (6 + 1 + 1 + 3 + 5 + 5 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018897 + ... + 1018956.

It is an arithmetic number, because the mean of its divisors is an integer number (9170343).

Almost surely, 2^61135590 is an apocalyptic number.

61135590 is an abundant number, since it is smaller than the sum of its proper divisors (85589898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61135590 is a wasteful number, since it uses less digits than its factorization.

61135590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037863.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 61135590 is about 7818.9251179430. The cubic root of 61135590 is about 393.9411689496.

The spelling of 61135590 in words is "sixty-one million, one hundred thirty-five thousand, five hundred ninety".