540815646 has 96 divisors (see below), whose sum is σ = 1310128128. Its totient is φ = 148669920.

The previous prime is 540815641. The next prime is 540815651. The reversal of 540815646 is 646518045.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (540815641) and next prime (540815651).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540815641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3126016 + ... + 3126188.

It is an arithmetic number, because the mean of its divisors is an integer number (13647168).

Almost surely, 2^540815646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 540815646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655064064).

540815646 is an abundant number, since it is smaller than the sum of its proper divisors (769312482).

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

540815646 is an equidigital number, since it uses as much as digits as its factorization.

540815646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 540815646 is about 23255.4433627914. The cubic root of 540815646 is about 814.7350794391.

The spelling of 540815646 in words is "five hundred forty million, eight hundred fifteen thousand, six hundred forty-six".