1516271640 has 256 divisors, whose sum is σ = 5058547200. Its totient is φ = 361304064.

The previous prime is 1516271623. The next prime is 1516271689. The reversal of 1516271640 is 461726151.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9302199 + ... + 9302361.

It is an arithmetic number, because the mean of its divisors is an integer number (19759950).

Almost surely, 2^1516271640 is an apocalyptic number.

1516271640 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 1516271640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2529273600).

1516271640 is an abundant number, since it is smaller than the sum of its proper divisors (3542275560).

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

1516271640 is a wasteful number, since it uses less digits than its factorization.

1516271640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1516271640 is about 38939.3328140070. The cubic root of 1516271640 is about 1148.8385602308.

Adding to 1516271640 its reverse (461726151), we get a palindrome (1977997791).

The spelling of 1516271640 in words is "one billion, five hundred sixteen million, two hundred seventy-one thousand, six hundred forty".