15854655940 has 48 divisors (see below), whose sum is σ = 35348089392. Its totient is φ = 5952761856.

The previous prime is 15854655919. The next prime is 15854655979. The reversal of 15854655940 is 4955645851.

It can be written as a sum of positive squares in 8 ways, for example, as 530196676 + 15324459264 = 23026^2 + 123792^2 .

It is a super-2 number, since 2×15854655940² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64312 + ... + 189328.

It is an arithmetic number, because the mean of its divisors is an integer number (736418529).

Almost surely, 2^15854655940 is an apocalyptic number.

15854655940 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 15854655940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17674044696).

15854655940 is an abundant number, since it is smaller than the sum of its proper divisors (19493433452).

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

15854655940 is a wasteful number, since it uses less digits than its factorization.

15854655940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125416 (or 125414 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 15854655940 in words is "fifteen billion, eight hundred fifty-four million, six hundred fifty-five thousand, nine hundred forty".