61504204132431 has 12 divisors (see below), whose sum is σ = 91240470995752. Its totient is φ = 39894618896496.

The previous prime is 61504204132373. The next prime is 61504204132457. The reversal of 61504204132431 is 13423140240516.

61504204132431 is a `hidden beast` number, since 6 + 1 + 5 + 0 + 4 + 204 + 13 + 2 + 431 = 666.

It is not a de Polignac number, because 61504204132431 - 2⁹ = 61504204131919 is a prime.

It is a super-2 number, since 2×61504204132431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61504204132031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92348654521 + ... + 92348655186.

Almost surely, 2^{61504204132431} is an apocalyptic number.

61504204132431 is a deficient number, since it is larger than the sum of its proper divisors (29736266863321).

61504204132431 is a wasteful number, since it uses less digits than its factorization.

61504204132431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184697309750 (or 184697309747 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 61504204132431 its reverse (13423140240516), we get a palindrome (74927344372947).

The spelling of 61504204132431 in words is "sixty-one trillion, five hundred four billion, two hundred four million, one hundred thirty-two thousand, four hundred thirty-one".