540363400781 has 16 divisors (see below), whose sum is σ = 560392182000. Its totient is φ = 520686336000.

The previous prime is 540363400771. The next prime is 540363400807. The reversal of 540363400781 is 187004363045.

It can be written as a sum of positive squares in 8 ways, for example, as 26718844681 + 513644556100 = 163459^2 + 716690^2 .

It is a cyclic number.

It is not a de Polignac number, because 540363400781 - 2²² = 540359206477 is a prime.

It is a super-2 number, since 2×540363400781² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540363400741) 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, 1534145 + ... + 1853193.

It is an arithmetic number, because the mean of its divisors is an integer number (35024511375).

Almost surely, 2^540363400781 is an apocalyptic number.

It is an amenable number.

540363400781 is a deficient number, since it is larger than the sum of its proper divisors (20028781219).

540363400781 is a wasteful number, since it uses less digits than its factorization.

540363400781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319600.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 540363400781 in words is "five hundred forty billion, three hundred sixty-three million, four hundred thousand, seven hundred eighty-one".