61634564087 has 2 divisors, whose sum is σ = 61634564088. Its totient is φ = 61634564086.

The previous prime is 61634564051. The next prime is 61634564093. The reversal of 61634564087 is 78046543616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61634564087 - 2⁶ = 61634564023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61634564587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30817282043 + 30817282044.

It is an arithmetic number, because the mean of its divisors is an integer number (30817282044).

Almost surely, 2^61634564087 is an apocalyptic number.

61634564087 is a deficient number, since it is larger than the sum of its proper divisors (1).

61634564087 is an equidigital number, since it uses as much as digits as its factorization.

61634564087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 61634564087 in words is "sixty-one billion, six hundred thirty-four million, five hundred sixty-four thousand, eighty-seven".