115735121661220 has 24 divisors (see below), whose sum is σ = 251424574644600. Its totient is φ = 44697702158592.

The previous prime is 115735121661179. The next prime is 115735121661233. The reversal of 115735121661220 is 22166121537511.

It can be written as a sum of positive squares in 4 ways, for example, as 784645183204 + 114950476478016 = 885802^2 + 10721496^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99771656025 + ... + 99771657184.

It is an arithmetic number, because the mean of its divisors is an integer number (10476023943525).

Almost surely, 2^{115735121661220} is an apocalyptic number.

115735121661220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115735121661220 is an abundant number, since it is smaller than the sum of its proper divisors (135689452983380).

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

115735121661220 is a wasteful number, since it uses less digits than its factorization.

115735121661220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199543313247 (or 199543313245 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 115735121661220 in words is "one hundred fifteen trillion, seven hundred thirty-five billion, one hundred twenty-one million, six hundred sixty-one thousand, two hundred twenty".