61349882881 has 4 divisors (see below), whose sum is σ = 70114151872. Its totient is φ = 52585613892.

The previous prime is 61349882813. The next prime is 61349882917. The reversal of 61349882881 is 18828894316.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61349882881 - 2⁷ = 61349882753 is a prime.

It is a super-2 number, since 2×61349882881² (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 (61349882381) 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, 4382134485 + ... + 4382134498.

It is an arithmetic number, because the mean of its divisors is an integer number (17528537968).

Almost surely, 2^61349882881 is an apocalyptic number.

It is an amenable number.

61349882881 is a deficient number, since it is larger than the sum of its proper divisors (8764268991).

61349882881 is an equidigital number, since it uses as much as digits as its factorization.

61349882881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764268990.

The product of its digits is 5308416, while the sum is 58.

The spelling of 61349882881 in words is "sixty-one billion, three hundred forty-nine million, eight hundred eighty-two thousand, eight hundred eighty-one".