61880443681 has 8 divisors (see below), whose sum is σ = 70734952640. Its totient is φ = 53029546128.

The previous prime is 61880443663. The next prime is 61880443739. The reversal of 61880443681 is 18634408816.

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 61880443681 - 2¹⁹ = 61879919393 is a prime.

It is a super-2 number, since 2×61880443681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61880443631) 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, 866031 + ... + 934756.

It is an arithmetic number, because the mean of its divisors is an integer number (8841869080).

Almost surely, 2^61880443681 is an apocalyptic number.

It is an amenable number.

61880443681 is a deficient number, since it is larger than the sum of its proper divisors (8854508959).

61880443681 is a wasteful number, since it uses less digits than its factorization.

61880443681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805703.

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 61880443681 in words is "sixty-one billion, eight hundred eighty million, four hundred forty-three thousand, six hundred eighty-one".