61115515098 has 32 divisors (see below), whose sum is σ = 133425842112. Its totient is φ = 18508339200.

The previous prime is 61115515093. The next prime is 61115515127. The reversal of 61115515098 is 89051551116.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61115515093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180583 + ... + 393498.

It is an arithmetic number, because the mean of its divisors is an integer number (4169557566).

Almost surely, 2^61115515098 is an apocalyptic number.

61115515098 is an abundant number, since it is smaller than the sum of its proper divisors (72310327014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61115515098 is a wasteful number, since it uses less digits than its factorization.

61115515098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575710.

The product of its (nonzero) digits is 54000, while the sum is 42.

The spelling of 61115515098 in words is "sixty-one billion, one hundred fifteen million, five hundred fifteen thousand, ninety-eight".