640251202152046 has 16 divisors (see below), whose sum is σ = 965534514474240. Its totient is φ = 318410967039480.

The previous prime is 640251202152017. The next prime is 640251202152059.

640251202152046 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×640251202152046² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1150482820 + ... + 1151039191.

It is an arithmetic number, because the mean of its divisors is an integer number (60345907154640).

Almost surely, 2^{640251202152046} is an apocalyptic number.

640251202152046 is a deficient number, since it is larger than the sum of its proper divisors (325283312322194).

640251202152046 is a wasteful number, since it uses less digits than its factorization.

640251202152046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2301522759.

The product of its (nonzero) digits is 230400, while the sum is 40.

It can be divided in two parts, 64025120 and 2152046, that added together give a palindrome (66177166).

The spelling of 640251202152046 in words is "six hundred forty trillion, two hundred fifty-one billion, two hundred two million, one hundred fifty-two thousand, forty-six".