61104998987 has 2 divisors, whose sum is σ = 61104998988. Its totient is φ = 61104998986.

The previous prime is 61104998947. The next prime is 61104999041. The reversal of 61104998987 is 78989940116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61104998987 - 2¹⁰ = 61104997963 is a prime.

It is not a weakly prime, because it can be changed into another prime (61104998947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30552499493 + 30552499494.

It is an arithmetic number, because the mean of its divisors is an integer number (30552499494).

Almost surely, 2^61104998987 is an apocalyptic number.

61104998987 is a deficient number, since it is larger than the sum of its proper divisors (1).

61104998987 is an equidigital number, since it uses as much as digits as its factorization.

61104998987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 61104998987 in words is "sixty-one billion, one hundred four million, nine hundred ninety-eight thousand, nine hundred eighty-seven".