15641376340 has 24 divisors (see below), whose sum is σ = 33036764040. Its totient is φ = 6220384128.

The previous prime is 15641376329. The next prime is 15641376353. The reversal of 15641376340 is 4367314651.

It can be written as a sum of positive squares in 4 ways, for example, as 7916372676 + 7725003664 = 88974^2 + 87892^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15641376293 and 15641376302.

It is a congruent number.

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, 2256855 + ... + 2263774.

It is an arithmetic number, because the mean of its divisors is an integer number (1376531835).

Almost surely, 2^15641376340 is an apocalyptic number.

15641376340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15641376340 is an abundant number, since it is smaller than the sum of its proper divisors (17395387700).

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

15641376340 is a wasteful number, since it uses less digits than its factorization.

15641376340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520811 (or 4520809 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 15641376340 in words is "fifteen billion, six hundred forty-one million, three hundred seventy-six thousand, three hundred forty".