64621402127 has 2 divisors, whose sum is σ = 64621402128. Its totient is φ = 64621402126.

The previous prime is 64621402057. The next prime is 64621402187. The reversal of 64621402127 is 72120412646.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64621402127 - 2¹² = 64621398031 is a prime.

It is a super-2 number, since 2×64621402127² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64621402187) 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, 32310701063 + 32310701064.

It is an arithmetic number, because the mean of its divisors is an integer number (32310701064).

Almost surely, 2^64621402127 is an apocalyptic number.

64621402127 is a deficient number, since it is larger than the sum of its proper divisors (1).

64621402127 is an equidigital number, since it uses as much as digits as its factorization.

64621402127 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 64621402127 in words is "sixty-four billion, six hundred twenty-one million, four hundred two thousand, one hundred twenty-seven".