61404213204 has 18 divisors (see below), whose sum is σ = 155216205690. Its totient is φ = 20468071056.

The previous prime is 61404213193. The next prime is 61404213271. The reversal of 61404213204 is 40231240416.

It is a happy number.

61404213204 is a `hidden beast` number, since 614 + 0 + 4 + 21 + 3 + 20 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33697944900 + 27706268304 = 183570^2 + 166452^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

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, 852836259 + ... + 852836330.

Almost surely, 2^61404213204 is an apocalyptic number.

It is an amenable number.

61404213204 is an abundant number, since it is smaller than the sum of its proper divisors (93811992486).

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

61404213204 is a wasteful number, since it uses less digits than its factorization.

61404213204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705672599 (or 1705672594 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The spelling of 61404213204 in words is "sixty-one billion, four hundred four million, two hundred thirteen thousand, two hundred four".