61155258125 has 40 divisors (see below), whose sum is σ = 87139300248. Its totient is φ = 42504192000.

The previous prime is 61155258113. The next prime is 61155258133. The reversal of 61155258125 is 52185255116.

It can be written as a sum of positive squares in 20 ways, for example, as 54880558756 + 6274699369 = 234266^2 + 79213^2 .

It is not a de Polignac number, because 61155258125 - 2⁸ = 61155257869 is a prime.

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 39 ways as a sum of consecutive naturals, for example, 83252 + ... + 359501.

Almost surely, 2^61155258125 is an apocalyptic number.

61155258125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61155258125 is a deficient number, since it is larger than the sum of its proper divisors (25984042123).

61155258125 is a wasteful number, since it uses less digits than its factorization.

61155258125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442803 (or 442788 counting only the distinct ones).

The product of its digits is 120000, while the sum is 41.

The spelling of 61155258125 in words is "sixty-one billion, one hundred fifty-five million, two hundred fifty-eight thousand, one hundred twenty-five".