537566985540 has 72 divisors (see below), whose sum is σ = 1756052160408. Its totient is φ = 132324180480.

The previous prime is 537566985509. The next prime is 537566985551. The reversal of 537566985540 is 45589665735.

It is a happy number.

537566985540 is a `hidden beast` number, since 5 + 3 + 7 + 5 + 6 + 6 + 9 + 85 + 540 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2059162884 + 535507822656 = 45378^2 + 731784^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114862401 + ... + 114867080.

It is an arithmetic number, because the mean of its divisors is an integer number (24389613339).

Almost surely, 2^537566985540 is an apocalyptic number.

It is an amenable number.

537566985540 is an abundant number, since it is smaller than the sum of its proper divisors (1218485174868).

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

537566985540 is a wasteful number, since it uses less digits than its factorization.

537566985540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229729509 (or 229729504 counting only the distinct ones).

The product of its (nonzero) digits is 136080000, while the sum is 63.

The spelling of 537566985540 in words is "five hundred thirty-seven billion, five hundred sixty-six million, nine hundred eighty-five thousand, five hundred forty".