61873918689 has 8 divisors (see below), whose sum is σ = 89998427232. Its totient is φ = 37499344640.

The previous prime is 61873918681. The next prime is 61873918697. The reversal of 61873918689 is 98681937816.

It is an interprime number because it is at equal distance from previous prime (61873918681) and next prime (61873918697).

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 61873918689 - 2³ = 61873918681 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61873918681) 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, 937483584 + ... + 937483649.

It is an arithmetic number, because the mean of its divisors is an integer number (11249803404).

Almost surely, 2^61873918689 is an apocalyptic number.

It is an amenable number.

61873918689 is a deficient number, since it is larger than the sum of its proper divisors (28124508543).

61873918689 is a wasteful number, since it uses less digits than its factorization.

61873918689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1874967247.

The product of its digits is 31352832, while the sum is 66.

The spelling of 61873918689 in words is "sixty-one billion, eight hundred seventy-three million, nine hundred eighteen thousand, six hundred eighty-nine".