15690343680 has 576 divisors, whose sum is σ = 61369056000. Its totient is φ = 3764551680.

The previous prime is 15690343667. The next prime is 15690343693. The reversal of 15690343680 is 8634309651.

15690343680 is a `hidden beast` number, since 1 + 56 + 90 + 3 + 436 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (15690343667) and next prime (15690343693).

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56643702 + ... + 56643978.

It is an arithmetic number, because the mean of its divisors is an integer number (106543500).

Almost surely, 2^15690343680 is an apocalyptic number.

15690343680 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 15690343680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30684528000).

15690343680 is an abundant number, since it is smaller than the sum of its proper divisors (45678712320).

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

15690343680 is a wasteful number, since it uses less digits than its factorization.

15690343680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 15690343680 in words is "fifteen billion, six hundred ninety million, three hundred forty-three thousand, six hundred eighty".