61559379 has 32 divisors (see below), whose sum is σ = 107056640. Its totient is φ = 34222176.

The previous prime is 61559371. The next prime is 61559383. The reversal of 61559379 is 97395516.

61559379 is a `hidden beast` number, since 61 + 559 + 37 + 9 = 666.

It is not a de Polignac number, because 61559379 - 2³ = 61559371 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61559371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2592 + ... + 11394.

It is an arithmetic number, because the mean of its divisors is an integer number (3345520).

Almost surely, 2^61559379 is an apocalyptic number.

61559379 is a deficient number, since it is larger than the sum of its proper divisors (45497261).

61559379 is a wasteful number, since it uses less digits than its factorization.

61559379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856 (or 8850 counting only the distinct ones).

The product of its digits is 255150, while the sum is 45.

The square root of 61559379 is about 7845.9785240593. The cubic root of 61559379 is about 394.8493341958.

The spelling of 61559379 in words is "sixty-one million, five hundred fifty-nine thousand, three hundred seventy-nine".