204155551402 has 12 divisors (see below), whose sum is σ = 336603574818. Its totient is φ = 92797977800.

The previous prime is 204155551387. The next prime is 204155551421.

204155551402 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 107460051721 + 96695499681 = 327811^2 + 310959^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421808749 + ... + 421809232.

Almost surely, 2^204155551402 is an apocalyptic number.

204155551402 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

204155551402 is a deficient number, since it is larger than the sum of its proper divisors (132448023416).

204155551402 is a wasteful number, since it uses less digits than its factorization.

204155551402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843618005 (or 843617994 counting only the distinct ones).

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

It can be divided in two parts, 204155 and 551402, that added together give a palindrome (755557).

The spelling of 204155551402 in words is "two hundred four billion, one hundred fifty-five million, five hundred fifty-one thousand, four hundred two".