640155607533552 has 160 divisors (see below), whose sum is σ = 1910249670124800. Its totient is φ = 182570535055360.

The previous prime is 640155607533551. The next prime is 640155607533553. The reversal of 640155607533552 is 255335706551046.

It is an interprime number because it is at equal distance from previous prime (640155607533551) and next prime (640155607533553).

It is a super-3 number, since 3×640155607533552³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640155607533492 and 640155607533501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640155607533551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330455074 + ... + 332386622.

It is an arithmetic number, because the mean of its divisors is an integer number (11939060438280).

Almost surely, 2^{640155607533552} is an apocalyptic number.

It is an amenable number.

640155607533552 is an abundant number, since it is smaller than the sum of its proper divisors (1270094062591248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640155607533552 is a wasteful number, since it uses less digits than its factorization.

640155607533552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968511 (or 1968505 counting only the distinct ones).

The product of its (nonzero) digits is 56700000, while the sum is 57.

The spelling of 640155607533552 in words is "six hundred forty trillion, one hundred fifty-five billion, six hundred seven million, five hundred thirty-three thousand, five hundred fifty-two".