61131200725 has 30 divisors (see below), whose sum is σ = 88431295330. Its totient is φ = 41918496480.

The previous prime is 61131200719. The next prime is 61131200737. The reversal of 61131200725 is 52700213116.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 962054289 + 60169146436 = 31017^2 + 245294^2 .

It is not a de Polignac number, because 61131200725 - 2⁹ = 61131200213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61131200693 and 61131200702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 449190 + ... + 569239.

Almost surely, 2^61131200725 is an apocalyptic number.

It is an amenable number.

61131200725 is a deficient number, since it is larger than the sum of its proper divisors (27300094605).

61131200725 is an equidigital number, since it uses as much as digits as its factorization.

61131200725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018467 (or 1018441 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 61131200725 in words is "sixty-one billion, one hundred thirty-one million, two hundred thousand, seven hundred twenty-five".