15641605040 has 20 divisors (see below), whose sum is σ = 36366731904. Its totient is φ = 6256641984.

The previous prime is 15641605033. The next prime is 15641605061. The reversal of 15641605040 is 4050614651.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 15641604988 and 15641605006.

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 3 ways as a sum of consecutive naturals, for example, 97759952 + ... + 97760111.

Almost surely, 2^15641605040 is an apocalyptic number.

15641605040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15641605040 is an abundant number, since it is smaller than the sum of its proper divisors (20725126864).

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

15641605040 is a wasteful number, since it uses less digits than its factorization.

15641605040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195520076 (or 195520070 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 15641605040 in words is "fifteen billion, six hundred forty-one million, six hundred five thousand, forty".