640751537156126 has 8 divisors (see below), whose sum is σ = 1048502515346424. Its totient is φ = 291250698707320.

The previous prime is 640751537156123. The next prime is 640751537156233. The reversal of 640751537156126 is 621651735157046.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640751537156123) 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 3 ways as a sum of consecutive naturals, for example, 14562534935345 + ... + 14562534935388.

It is an arithmetic number, because the mean of its divisors is an integer number (131062814418303).

Almost surely, 2^{640751537156126} is an apocalyptic number.

640751537156126 is a deficient number, since it is larger than the sum of its proper divisors (407750978190298).

640751537156126 is a wasteful number, since it uses less digits than its factorization.

640751537156126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29125069870746.

The product of its (nonzero) digits is 31752000, while the sum is 59.

The spelling of 640751537156126 in words is "six hundred forty trillion, seven hundred fifty-one billion, five hundred thirty-seven million, one hundred fifty-six thousand, one hundred twenty-six".