64126040251 has 48 divisors (see below), whose sum is σ = 82606214880. Its totient is φ = 49305231360.

The previous prime is 64126040219. The next prime is 64126040257. The reversal of 64126040251 is 15204062146.

It is a happy number.

It is not a de Polignac number, because 64126040251 - 2⁵ = 64126040219 is a prime.

It is a super-2 number, since 2×64126040251² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64126040257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33207756 + ... + 33209686.

It is an arithmetic number, because the mean of its divisors is an integer number (1720962810).

Almost surely, 2^64126040251 is an apocalyptic number.

64126040251 is a deficient number, since it is larger than the sum of its proper divisors (18480174629).

64126040251 is a wasteful number, since it uses less digits than its factorization.

64126040251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404 (or 3397 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 64126040251 in words is "sixty-four billion, one hundred twenty-six million, forty thousand, two hundred fifty-one".