537781540 has 24 divisors (see below), whose sum is σ = 1140310080. Its totient is φ = 213023328.

The previous prime is 537781507. The next prime is 537781547. The reversal of 537781540 is 45187735.

It is a junction number, because it is equal to n+sod(n) for n = 537781493 and 537781502.

It is not an unprimeable number, because it can be changed into a prime (537781547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128470 + ... + 132589.

It is an arithmetic number, because the mean of its divisors is an integer number (47512920).

Almost surely, 2^537781540 is an apocalyptic number.

It is an amenable number.

537781540 is an abundant number, since it is smaller than the sum of its proper divisors (602528540).

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

537781540 is a wasteful number, since it uses less digits than its factorization.

537781540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261171 (or 261169 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 537781540 is about 23190.1172916396. The cubic root of 537781540 is about 813.2086012401.

The spelling of 537781540 in words is "five hundred thirty-seven million, seven hundred eighty-one thousand, five hundred forty".