640360143250 has 64 divisors (see below), whose sum is σ = 1261109865600. Its totient is φ = 243119620800.

The previous prime is 640360143197. The next prime is 640360143281. The reversal of 640360143250 is 52341063046.

It is a super-2 number, since 2×640360143250² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320772 + ... + 1176271.

It is an arithmetic number, because the mean of its divisors is an integer number (19704841650).

Almost surely, 2^640360143250 is an apocalyptic number.

640360143250 is a deficient number, since it is larger than the sum of its proper divisors (620749722350).

640360143250 is a wasteful number, since it uses less digits than its factorization.

640360143250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497148 (or 1497138 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 640360143250 in words is "six hundred forty billion, three hundred sixty million, one hundred forty-three thousand, two hundred fifty".