15698605440 has 256 divisors, whose sum is σ = 57300433920. Its totient is φ = 3581190144.

The previous prime is 15698605411. The next prime is 15698605493. The reversal of 15698605440 is 4450689651.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 15698605440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10173309 + ... + 10174851.

It is an arithmetic number, because the mean of its divisors is an integer number (223829820).

Almost surely, 2^15698605440 is an apocalyptic number.

15698605440 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 15698605440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28650216960).

15698605440 is an abundant number, since it is smaller than the sum of its proper divisors (41601828480).

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

15698605440 is a wasteful number, since it uses less digits than its factorization.

15698605440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 15698605440 in words is "fifteen billion, six hundred ninety-eight million, six hundred five thousand, four hundred forty".