61533513523660 has 24 divisors (see below), whose sum is σ = 129220552159776. Its totient is φ = 24613372312320.

The previous prime is 61533513523633. The next prime is 61533513523663. The reversal of 61533513523660 is 6632531533516.

It is not an unprimeable number, because it can be changed into a prime (61533513523663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17858884 + ... + 21023956.

It is an arithmetic number, because the mean of its divisors is an integer number (5384189673324).

Almost surely, 2^{61533513523660} is an apocalyptic number.

It is an amenable number.

61533513523660 is an abundant number, since it is smaller than the sum of its proper divisors (67687038636116).

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

61533513523660 is a wasteful number, since it uses less digits than its factorization.

61533513523660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137153 (or 4137151 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 49.

The spelling of 61533513523660 in words is "sixty-one trillion, five hundred thirty-three billion, five hundred thirteen million, five hundred twenty-three thousand, six hundred sixty".