640726086410 has 48 divisors (see below), whose sum is σ = 1176510031200. Its totient is φ = 251222373792.

The previous prime is 640726086409. The next prime is 640726086431. The reversal of 640726086410 is 14680627046.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8638061 + ... + 8711919.

It is an arithmetic number, because the mean of its divisors is an integer number (24510625650).

Almost surely, 2^640726086410 is an apocalyptic number.

640726086410 is a deficient number, since it is larger than the sum of its proper divisors (535783944790).

640726086410 is a wasteful number, since it uses less digits than its factorization.

640726086410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74163 (or 74084 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The spelling of 640726086410 in words is "six hundred forty billion, seven hundred twenty-six million, eighty-six thousand, four hundred ten".