61017960959 has 4 divisors (see below), whose sum is σ = 61034806416. Its totient is φ = 61001115504.

The previous prime is 61017960953. The next prime is 61017960979. The reversal of 61017960959 is 95906971016.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61017960959 - 2⁴ = 61017960943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61017960959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61017960953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8417294 + ... + 8424539.

It is an arithmetic number, because the mean of its divisors is an integer number (15258701604).

Almost surely, 2^61017960959 is an apocalyptic number.

61017960959 is a deficient number, since it is larger than the sum of its proper divisors (16845457).

61017960959 is a wasteful number, since it uses less digits than its factorization.

61017960959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16845456.

The product of its (nonzero) digits is 918540, while the sum is 53.

The spelling of 61017960959 in words is "sixty-one billion, seventeen million, nine hundred sixty thousand, nine hundred fifty-nine".