204515515402 has 16 divisors (see below), whose sum is σ = 334751392800. Its totient is φ = 92936697840.

The previous prime is 204515515381. The next prime is 204515515417.

204515515402 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160877 + ... + 1325392.

It is an arithmetic number, because the mean of its divisors is an integer number (20921962050).

Almost surely, 2^204515515402 is an apocalyptic number.

204515515402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

204515515402 is a deficient number, since it is larger than the sum of its proper divisors (130235877398).

204515515402 is a wasteful number, since it uses less digits than its factorization.

204515515402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2490021.

The product of its (nonzero) digits is 40000, while the sum is 34.

It can be divided in two parts, 204515 and 515402, that added together give a palindrome (719917).

The spelling of 204515515402 in words is "two hundred four billion, five hundred fifteen million, five hundred fifteen thousand, four hundred two".