61611115443306 has 96 divisors (see below), whose sum is σ = 145616497182720. Its totient is φ = 17227188014400.

The previous prime is 61611115443299. The next prime is 61611115443313. The reversal of 61611115443306 is 60334451111616.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61611115443299) and next prime (61611115443313).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27695271 + ... + 29837061.

It is an arithmetic number, because the mean of its divisors is an integer number (1516838512320).

Almost surely, 2^{61611115443306} is an apocalyptic number.

61611115443306 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 61611115443306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72808248591360).

61611115443306 is an abundant number, since it is smaller than the sum of its proper divisors (84005381739414).

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

61611115443306 is a wasteful number, since it uses less digits than its factorization.

61611115443306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144412 (or 2144399 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 61611115443306 in words is "sixty-one trillion, six hundred eleven billion, one hundred fifteen million, four hundred forty-three thousand, three hundred six".