2661120500404 has 24 divisors (see below), whose sum is σ = 4824418271400. Its totient is φ = 1282846185600.

The previous prime is 2661120500399. The next prime is 2661120500407. The reversal of 2661120500404 is 4040050211662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1523693984400 + 1137426516004 = 1234380^2 + 1066502^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661120500407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16281519 + ... + 16444150.

It is an arithmetic number, because the mean of its divisors is an integer number (201017427975).

Almost surely, 2^{2661120500404} is an apocalyptic number.

It is an amenable number.

2661120500404 is a deficient number, since it is larger than the sum of its proper divisors (2163297770996).

2661120500404 is a wasteful number, since it uses less digits than its factorization.

2661120500404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32726403 (or 32726401 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 2661120500404 in words is "two trillion, six hundred sixty-one billion, one hundred twenty million, five hundred thousand, four hundred four".