15387257340 has 1080 divisors, whose sum is σ = 64460575872. Its totient is φ = 3056901120.

The previous prime is 15387257329. The next prime is 15387257423. The reversal of 15387257340 is 4375278351.

15387257340 is a `hidden beast` number, since 1 + 5 + 3 + 8 + 72 + 573 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 415871802 + ... + 415871838.

Almost surely, 2^15387257340 is an apocalyptic number.

15387257340 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 15387257340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32230287936).

15387257340 is an abundant number, since it is smaller than the sum of its proper divisors (49073318532).

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

15387257340 is a wasteful number, since it uses less digits than its factorization.

15387257340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 15387257340 in words is "fifteen billion, three hundred eighty-seven million, two hundred fifty-seven thousand, three hundred forty".