15274002640 has 80 divisors (see below), whose sum is σ = 38536033536. Its totient is φ = 5596531200.

The previous prime is 15274002619. The next prime is 15274002641. The reversal of 15274002640 is 4620047251.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15274002641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80185 + ... + 192295.

Almost surely, 2^15274002640 is an apocalyptic number.

15274002640 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 15274002640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19268016768).

15274002640 is an abundant number, since it is smaller than the sum of its proper divisors (23262030896).

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

15274002640 is a wasteful number, since it uses less digits than its factorization.

15274002640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112268 (or 112262 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 15274002640 its reverse (4620047251), we get a palindrome (19894049891).

The spelling of 15274002640 in words is "fifteen billion, two hundred seventy-four million, two thousand, six hundred forty".