61912480391 has 2 divisors, whose sum is σ = 61912480392. Its totient is φ = 61912480390.

The previous prime is 61912480369. The next prime is 61912480499. The reversal of 61912480391 is 19308421916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61912480391 - 2²² = 61908286087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61912480351) by changing a digit.

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 as a sum of consecutive naturals, namely, 30956240195 + 30956240196.

It is an arithmetic number, because the mean of its divisors is an integer number (30956240196).

Almost surely, 2^61912480391 is an apocalyptic number.

61912480391 is a deficient number, since it is larger than the sum of its proper divisors (1).

61912480391 is an equidigital number, since it uses as much as digits as its factorization.

61912480391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 61912480391 in words is "sixty-one billion, nine hundred twelve million, four hundred eighty thousand, three hundred ninety-one".