61157579 has 8 divisors (see below), whose sum is σ = 69968640. Its totient is φ = 52365096.

The previous prime is 61157573. The next prime is 61157581. The reversal of 61157579 is 97575116.

61157579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61157579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61157573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3332 + ... + 11550.

It is an arithmetic number, because the mean of its divisors is an integer number (8746080).

Almost surely, 2^61157579 is an apocalyptic number.

61157579 is a deficient number, since it is larger than the sum of its proper divisors (8811061).

61157579 is a wasteful number, since it uses less digits than its factorization.

61157579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9289.

The product of its digits is 66150, while the sum is 41.

The square root of 61157579 is about 7820.3311310967. The cubic root of 61157579 is about 393.9883936732.

The spelling of 61157579 in words is "sixty-one million, one hundred fifty-seven thousand, five hundred seventy-nine".