15461894820 has 24 divisors (see below), whose sum is σ = 43293305664. Its totient is φ = 4123171936.

The previous prime is 15461894801. The next prime is 15461894821. The reversal of 15461894820 is 2849816451.

15461894820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 15461894820.

It is not an unprimeable number, because it can be changed into a prime (15461894821) 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, 128849064 + ... + 128849183.

It is an arithmetic number, because the mean of its divisors is an integer number (1803887736).

Almost surely, 2^15461894820 is an apocalyptic number.

15461894820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15461894820 is an abundant number, since it is smaller than the sum of its proper divisors (27831410844).

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

15461894820 is a wasteful number, since it uses less digits than its factorization.

15461894820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257698259 (or 257698257 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 15461894820 in words is "fifteen billion, four hundred sixty-one million, eight hundred ninety-four thousand, eight hundred twenty".