61960111559 has 4 divisors (see below), whose sum is σ = 64096667160. Its totient is φ = 59823555960.

The previous prime is 61960111537. The next prime is 61960111573. The reversal of 61960111559 is 95511106916.

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

It is a de Polignac number, because none of the positive numbers 2^k-61960111559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61960311559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068277757 + ... + 1068277814.

It is an arithmetic number, because the mean of its divisors is an integer number (16024166790).

Almost surely, 2^61960111559 is an apocalyptic number.

61960111559 is a deficient number, since it is larger than the sum of its proper divisors (2136555601).

61960111559 is a wasteful number, since it uses less digits than its factorization.

61960111559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136555600.

The product of its (nonzero) digits is 72900, while the sum is 44.

The spelling of 61960111559 in words is "sixty-one billion, nine hundred sixty million, one hundred eleven thousand, five hundred fifty-nine".