64129945099 has 12 divisors (see below), whose sum is σ = 71480146968. Its totient is φ = 57059504000.

The previous prime is 64129945081. The next prime is 64129945129. The reversal of 64129945099 is 99054992146.

It is not a de Polignac number, because 64129945099 - 2¹³ = 64129936907 is a prime.

It is a super-2 number, since 2×64129945099² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64129975099) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1295302 + ... + 1343899.

It is an arithmetic number, because the mean of its divisors is an integer number (5956678914).

Almost surely, 2^64129945099 is an apocalyptic number.

64129945099 is a deficient number, since it is larger than the sum of its proper divisors (7350201869).

64129945099 is a wasteful number, since it uses less digits than its factorization.

64129945099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639306 (or 2639259 counting only the distinct ones).

The product of its (nonzero) digits is 6298560, while the sum is 58.

The spelling of 64129945099 in words is "sixty-four billion, one hundred twenty-nine million, nine hundred forty-five thousand, ninety-nine".