133145027540 has 72 divisors (see below), whose sum is σ = 328132910952. Its totient is φ = 45245706240.

The previous prime is 133145027489. The next prime is 133145027549. The reversal of 133145027540 is 45720541331.

It can be written as a sum of positive squares in 4 ways, for example, as 2750373136 + 130394654404 = 52444^2 + 361102^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 133145027540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133145027549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490421 + ... + 711900.

It is an arithmetic number, because the mean of its divisors is an integer number (4557401541).

Almost surely, 2^133145027540 is an apocalyptic number.

133145027540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133145027540 is an abundant number, since it is smaller than the sum of its proper divisors (194987883412).

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

133145027540 is a wasteful number, since it uses less digits than its factorization.

133145027540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202457 (or 1202448 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

Adding to 133145027540 its reverse (45720541331), we get a palindrome (178865568871).

The spelling of 133145027540 in words is "one hundred thirty-three billion, one hundred forty-five million, twenty-seven thousand, five hundred forty".