133525020737 has 4 divisors (see below), whose sum is σ = 133652309700. Its totient is φ = 133397731776.

The previous prime is 133525020721. The next prime is 133525020773. The reversal of 133525020737 is 737020525331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122247430321 + 11277590416 = 349639^2 + 106196^2 .

It is a cyclic number.

It is not a de Polignac number, because 133525020737 - 2⁴ = 133525020721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133525020737.

It is not an unprimeable number, because it can be changed into a prime (133525020137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63642908 + ... + 63645005.

It is an arithmetic number, because the mean of its divisors is an integer number (33413077425).

Almost surely, 2^133525020737 is an apocalyptic number.

It is an amenable number.

133525020737 is a deficient number, since it is larger than the sum of its proper divisors (127288963).

133525020737 is a wasteful number, since it uses less digits than its factorization.

133525020737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127288962.

The product of its (nonzero) digits is 132300, while the sum is 38.

The spelling of 133525020737 in words is "one hundred thirty-three billion, five hundred twenty-five million, twenty thousand, seven hundred thirty-seven".