15949296640 has 352 divisors, whose sum is σ = 43804882944. Its totient is φ = 5536481280.

The previous prime is 15949296613. The next prime is 15949296647. The reversal of 15949296640 is 4669294951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15949296647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62059392 + ... + 62059648.

Almost surely, 2^15949296640 is an apocalyptic number.

15949296640 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 15949296640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21902441472).

15949296640 is an abundant number, since it is smaller than the sum of its proper divisors (27855586304).

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

15949296640 is a wasteful number, since it uses less digits than its factorization.

15949296640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 15949296640 in words is "fifteen billion, nine hundred forty-nine million, two hundred ninety-six thousand, six hundred forty".