61690115999 has 2 divisors, whose sum is σ = 61690116000. Its totient is φ = 61690115998.

The previous prime is 61690115957. The next prime is 61690116029. The reversal of 61690115999 is 99951109616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61690115999 - 2¹⁶ = 61690050463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61690115939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30845057999 + 30845058000.

It is an arithmetic number, because the mean of its divisors is an integer number (30845058000).

Almost surely, 2^61690115999 is an apocalyptic number.

61690115999 is a deficient number, since it is larger than the sum of its proper divisors (1).

61690115999 is an equidigital number, since it uses as much as digits as its factorization.

61690115999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1180980, while the sum is 56.

The spelling of 61690115999 in words is "sixty-one billion, six hundred ninety million, one hundred fifteen thousand, nine hundred ninety-nine".