15641541740 has 72 divisors (see below), whose sum is σ = 36510989760. Its totient is φ = 5623847680.

The previous prime is 15641541739. The next prime is 15641541793. The reversal of 15641541740 is 4714514651.

It is a junction number, because it is equal to n+sod(n) for n = 15641541694 and 15641541703.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 179069 + ... + 251691.

It is an arithmetic number, because the mean of its divisors is an integer number (507097080).

Almost surely, 2^15641541740 is an apocalyptic number.

15641541740 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 15641541740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18255494880).

15641541740 is an abundant number, since it is smaller than the sum of its proper divisors (20869448020).

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

15641541740 is a wasteful number, since it uses less digits than its factorization.

15641541740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72743 (or 72730 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 15641541740 in words is "fifteen billion, six hundred forty-one million, five hundred forty-one thousand, seven hundred forty".