906490172537 has 4 divisors (see below), whose sum is σ = 907768720740. Its totient is φ = 905211624336.

The previous prime is 906490172527. The next prime is 906490172561. The reversal of 906490172537 is 735271094609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735271094609 = 18899 ⋅38905291.

It can be written as a sum of positive squares in 2 ways, for example, as 44320354576 + 862169817961 = 210524^2 + 928531^2 .

It is a cyclic number.

It is not a de Polignac number, because 906490172537 - 2⁸ = 906490172281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (906490172527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639273038 + ... + 639274455.

It is an arithmetic number, because the mean of its divisors is an integer number (226942180185).

Almost surely, 2^906490172537 is an apocalyptic number.

It is an amenable number.

906490172537 is a deficient number, since it is larger than the sum of its proper divisors (1278548203).

906490172537 is a wasteful number, since it uses less digits than its factorization.

906490172537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278548202.

The product of its (nonzero) digits is 2857680, while the sum is 53.

The spelling of 906490172537 in words is "nine hundred six billion, four hundred ninety million, one hundred seventy-two thousand, five hundred thirty-seven".