61971658559 has 8 divisors (see below), whose sum is σ = 62310032928. Its totient is φ = 61633524960.

The previous prime is 61971658537. The next prime is 61971658561. The reversal of 61971658559 is 95585617916.

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

It is a cyclic number.

It is not a de Polignac number, because 61971658559 - 2⁸ = 61971658303 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 (61971648559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468614 + ... + 586124.

It is an arithmetic number, because the mean of its divisors is an integer number (7788754116).

Almost surely, 2^61971658559 is an apocalyptic number.

61971658559 is a deficient number, since it is larger than the sum of its proper divisors (338374369).

61971658559 is a wasteful number, since it uses less digits than its factorization.

61971658559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120385.

The product of its digits is 20412000, while the sum is 62.

The spelling of 61971658559 in words is "sixty-one billion, nine hundred seventy-one million, six hundred fifty-eight thousand, five hundred fifty-nine".