15478071840 has 1536 divisors, whose sum is σ = 74317824000. Its totient is φ = 2911334400.

The previous prime is 15478071811. The next prime is 15478071887. The reversal of 15478071840 is 4817087451.

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

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 195924921 + ... + 195924999.

It is an arithmetic number, because the mean of its divisors is an integer number (48384000).

Almost surely, 2^15478071840 is an apocalyptic number.

15478071840 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 15478071840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37158912000).

15478071840 is an abundant number, since it is smaller than the sum of its proper divisors (58839752160).

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

15478071840 is a wasteful number, since it uses less digits than its factorization.

15478071840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 157 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 15478071840 in words is "fifteen billion, four hundred seventy-eight million, seventy-one thousand, eight hundred forty".