515553163640 has 16 divisors (see below), whose sum is σ = 1159994618280. Its totient is φ = 206221265440.

The previous prime is 515553163621. The next prime is 515553163649. The reversal of 515553163640 is 46361355515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 515553163591 and 515553163600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515553163649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6444414506 + ... + 6444414585.

Almost surely, 2^515553163640 is an apocalyptic number.

It is an amenable number.

515553163640 is an abundant number, since it is smaller than the sum of its proper divisors (644441454640).

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

515553163640 is a wasteful number, since it uses less digits than its factorization.

515553163640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888829102 (or 12888829098 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 515553163640 in words is "five hundred fifteen billion, five hundred fifty-three million, one hundred sixty-three thousand, six hundred forty".