15355298768640 has 144 divisors (see below), whose sum is σ = 49427136503808. Its totient is φ = 4062504112128.

The previous prime is 15355298768521. The next prime is 15355298768647. The reversal of 15355298768640 is 4686789255351.

15355298768640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15355298768647) 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, 15255532 + ... + 16230891.

It is a 1-persistent number, because it is pandigital, but 2⋅15355298768640 = 30710597537280 is not.

Almost surely, 2^{15355298768640} is an apocalyptic number.

15355298768640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15355298768640 is an abundant number, since it is smaller than the sum of its proper divisors (34071837735168).

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

15355298768640 is a wasteful number, since it uses less digits than its factorization.

15355298768640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31486574 (or 31486560 counting only the distinct ones).

The product of its (nonzero) digits is 435456000, while the sum is 69.

The spelling of 15355298768640 in words is "fifteen trillion, three hundred fifty-five billion, two hundred ninety-eight million, seven hundred sixty-eight thousand, six hundred forty".