640270653553750 has 160 divisors (see below), whose sum is σ = 1248207695779968. Its totient is φ = 246040930080000.

The previous prime is 640270653553697. The next prime is 640270653553789. The reversal of 640270653553750 is 57355356072046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9624767989 + ... + 9624834511.

Almost surely, 2^{640270653553750} is an apocalyptic number.

640270653553750 is a deficient number, since it is larger than the sum of its proper divisors (607937042226218).

640270653553750 is a wasteful number, since it uses less digits than its factorization.

640270653553750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69456 (or 69441 counting only the distinct ones).

The product of its (nonzero) digits is 79380000, while the sum is 58.

The spelling of 640270653553750 in words is "six hundred forty trillion, two hundred seventy billion, six hundred fifty-three million, five hundred fifty-three thousand, seven hundred fifty".