14991501840 has 160 divisors (see below), whose sum is σ = 53420795136. Its totient is φ = 3406755840.

The previous prime is 14991501827. The next prime is 14991501841. The reversal of 14991501840 is 4810519941.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 14991501792 and 14991501801.

It is not an unprimeable number, because it can be changed into a prime (14991501841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264850 + ... + 316430.

Almost surely, 2^14991501840 is an apocalyptic number.

14991501840 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 14991501840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26710397568).

14991501840 is an abundant number, since it is smaller than the sum of its proper divisors (38429293296).

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

14991501840 is a wasteful number, since it uses less digits than its factorization.

14991501840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51777 (or 51771 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 42.

The spelling of 14991501840 in words is "fourteen billion, nine hundred ninety-one million, five hundred one thousand, eight hundred forty".