61404321604012 has 24 divisors (see below), whose sum is σ = 107867429001360. Its totient is φ = 30585111809280.

The previous prime is 61404321604007. The next prime is 61404321604013. The reversal of 61404321604012 is 21040612340416.

It is a super-2 number, since 2×61404321604012² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61404321604013) 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, 2535978 + ... + 11368369.

It is an arithmetic number, because the mean of its divisors is an integer number (4494476208390).

Almost surely, 2^{61404321604012} is an apocalyptic number.

It is an amenable number.

61404321604012 is a deficient number, since it is larger than the sum of its proper divisors (46463107397348).

61404321604012 is a wasteful number, since it uses less digits than its factorization.

61404321604012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13908561 (or 13908559 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 61404321604012 its reverse (21040612340416), we get a palindrome (82444933944428).

The spelling of 61404321604012 in words is "sixty-one trillion, four hundred four billion, three hundred twenty-one million, six hundred four thousand, twelve".