15421145501240 has 16 divisors (see below), whose sum is σ = 34697577377880. Its totient is φ = 6168458200480.

The previous prime is 15421145501231. The next prime is 15421145501257. The reversal of 15421145501240 is 4210554112451.

It is a self number, because there is not a number n which added to its sum of digits gives 15421145501240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192764318726 + ... + 192764318805.

Almost surely, 2^{15421145501240} is an apocalyptic number.

15421145501240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15421145501240 is an abundant number, since it is smaller than the sum of its proper divisors (19276431876640).

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

15421145501240 is a wasteful number, since it uses less digits than its factorization.

15421145501240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385528637542 (or 385528637538 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 35.

Adding to 15421145501240 its reverse (4210554112451), we get a palindrome (19631699613691).

The spelling of 15421145501240 in words is "fifteen trillion, four hundred twenty-one billion, one hundred forty-five million, five hundred one thousand, two hundred forty".