61400405204 has 12 divisors (see below), whose sum is σ = 108514578228. Its totient is φ = 30396240000.

The previous prime is 61400405203. The next prime is 61400405249. The reversal of 61400405204 is 40250400416.

It can be written as a sum of positive squares in 2 ways, for example, as 29019122500 + 32381282704 = 170350^2 + 179948^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61400405203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75990197 + ... + 75991004.

It is an arithmetic number, because the mean of its divisors is an integer number (9042881519).

Almost surely, 2^61400405204 is an apocalyptic number.

It is an amenable number.

61400405204 is a deficient number, since it is larger than the sum of its proper divisors (47114173024).

61400405204 is a wasteful number, since it uses less digits than its factorization.

61400405204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151981306 (or 151981304 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The spelling of 61400405204 in words is "sixty-one billion, four hundred million, four hundred five thousand, two hundred four".