61880916402 has 54 divisors (see below), whose sum is σ = 142467337623. Its totient is φ = 19407992064.

The previous prime is 61880916371. The next prime is 61880916439. The reversal of 61880916402 is 20461908816.

It can be written as a sum of positive squares in 5 ways, for example, as 7996115241 + 53884801161 = 89421^2 + 232131^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=175899.

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 17939974 + ... + 17943422.

Almost surely, 2^61880916402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61880916402

61880916402 is an abundant number, since it is smaller than the sum of its proper divisors (80586421221).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61880916402 is an equidigital number, since it uses as much as digits as its factorization.

61880916402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6940 (or 3471 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 61880916402 in words is "sixty-one billion, eight hundred eighty million, nine hundred sixteen thousand, four hundred two".