204155415030555 has 48 divisors (see below), whose sum is σ = 357709648724064. Its totient is φ = 107702475171840.

The previous prime is 204155415030517. The next prime is 204155415030601. The reversal of 204155415030555 is 555030514551402.

204155415030555 is a `hidden beast` number, since 2 + 0 + 4 + 1 + 5 + 5 + 41 + 50 + 3 + 0 + 555 = 666.

It is not a de Polignac number, because 204155415030555 - 2¹⁴ = 204155415014171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 204155415030555.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4442829 + ... + 20689358.

It is an arithmetic number, because the mean of its divisors is an integer number (7452284348418).

Almost surely, 2^{204155415030555} is an apocalyptic number.

204155415030555 is a deficient number, since it is larger than the sum of its proper divisors (153554233693509).

204155415030555 is a wasteful number, since it uses less digits than its factorization.

204155415030555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25134156 (or 25134153 counting only the distinct ones).

The product of its (nonzero) digits is 1500000, while the sum is 45.

Adding to 204155415030555 its reverse (555030514551402), we get a palindrome (759185929581957).

The spelling of 204155415030555 in words is "two hundred four trillion, one hundred fifty-five billion, four hundred fifteen million, thirty thousand, five hundred fifty-five".