64124999987 has 2 divisors, whose sum is σ = 64124999988. Its totient is φ = 64124999986.

The previous prime is 64124999977. The next prime is 64125000011. The reversal of 64124999987 is 78999942146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64124999987 - 2¹⁶ = 64124934451 is a prime.

It is a super-2 number, since 2×64124999987² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64124999977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32062499993 + 32062499994.

It is an arithmetic number, because the mean of its divisors is an integer number (32062499994).

Almost surely, 2^64124999987 is an apocalyptic number.

64124999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

64124999987 is an equidigital number, since it uses as much as digits as its factorization.

64124999987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70543872, while the sum is 68.

The spelling of 64124999987 in words is "sixty-four billion, one hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred eighty-seven".