15393774309640 has 128 divisors (see below), whose sum is σ = 35972832758400. Its totient is φ = 5925273569280.

The previous prime is 15393774309629. The next prime is 15393774309677. The reversal of 15393774309640 is 4690347739351.

It is a super-2 number, since 2×15393774309640² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27424195 + ... + 27979885.

It is an arithmetic number, because the mean of its divisors is an integer number (281037755925).

Almost surely, 2^{15393774309640} is an apocalyptic number.

15393774309640 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 15393774309640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17986416379200).

15393774309640 is an abundant number, since it is smaller than the sum of its proper divisors (20579058448760).

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

15393774309640 is a wasteful number, since it uses less digits than its factorization.

15393774309640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556007 (or 556003 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 61.

The spelling of 15393774309640 in words is "fifteen trillion, three hundred ninety-three billion, seven hundred seventy-four million, three hundred nine thousand, six hundred forty".