15533197771960 has 128 divisors (see below), whose sum is σ = 40137155251200. Its totient is φ = 5350678248960.

The previous prime is 15533197771957. The next prime is 15533197771969. The reversal of 15533197771960 is 6917779133551.

It is a junction number, because it is equal to n+sod(n) for n = 15533197771892 and 15533197771901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15533197771969) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 102560049 + ... + 102711391.

It is an arithmetic number, because the mean of its divisors is an integer number (313571525400).

Almost surely, 2^{15533197771960} is an apocalyptic number.

15533197771960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15533197771960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20068577625600).

15533197771960 is an abundant number, since it is smaller than the sum of its proper divisors (24603957479240).

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

15533197771960 is a wasteful number, since it uses less digits than its factorization.

15533197771960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163661 (or 163657 counting only the distinct ones).

The product of its (nonzero) digits is 37507050, while the sum is 64.

The spelling of 15533197771960 in words is "fifteen trillion, five hundred thirty-three billion, one hundred ninety-seven million, seven hundred seventy-one thousand, nine hundred sixty".