640148633553 has 48 divisors (see below), whose sum is σ = 1018655217216. Its totient is φ = 354432798720.

The previous prime is 640148633513. The next prime is 640148633557. The reversal of 640148633553 is 355336841046.

It is not a de Polignac number, because 640148633553 - 2¹⁴ = 640148617169 is a prime.

It is a super-3 number, since 3×640148633553³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (640148633557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50700 + ... + 1132637.

It is an arithmetic number, because the mean of its divisors is an integer number (21221983692).

Almost surely, 2^640148633553 is an apocalyptic number.

It is an amenable number.

640148633553 is a deficient number, since it is larger than the sum of its proper divisors (378506583663).

640148633553 is a wasteful number, since it uses less digits than its factorization.

640148633553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183474 (or 1183461 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 640148633553 in words is "six hundred forty billion, one hundred forty-eight million, six hundred thirty-three thousand, five hundred fifty-three".