15400966820 has 24 divisors (see below), whose sum is σ = 32662252728. Its totient is φ = 6099392000.

The previous prime is 15400966793. The next prime is 15400966829. The reversal of 15400966820 is 2866900451.

It is a happy number.

15400966820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7173751204 + 8227215616 = 84698^2 + 90704^2 .

It is not an unprimeable number, because it can be changed into a prime (15400966829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3810101 + ... + 3814140.

It is an arithmetic number, because the mean of its divisors is an integer number (1360927197).

Almost surely, 2^15400966820 is an apocalyptic number.

15400966820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15400966820 is an abundant number, since it is smaller than the sum of its proper divisors (17261285908).

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

15400966820 is a wasteful number, since it uses less digits than its factorization.

15400966820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7624351 (or 7624349 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 15400966820 in words is "fifteen billion, four hundred million, nine hundred sixty-six thousand, eight hundred twenty".