537421631691 has 16 divisors (see below), whose sum is σ = 818944423424. Its totient is φ = 307091991744.

The previous prime is 537421631689. The next prime is 537421631693. The reversal of 537421631691 is 196136124735.

It is an interprime number because it is at equal distance from previous prime (537421631689) and next prime (537421631693).

It is not a de Polignac number, because 537421631691 - 2¹ = 537421631689 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 537421631691.

It is not an unprimeable number, because it can be changed into a prime (537421631693) 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 15 ways as a sum of consecutive naturals, for example, 968946 + ... + 1419048.

It is an arithmetic number, because the mean of its divisors is an integer number (51184026464).

Almost surely, 2^537421631691 is an apocalyptic number.

537421631691 is a deficient number, since it is larger than the sum of its proper divisors (281522791733).

537421631691 is a wasteful number, since it uses less digits than its factorization.

537421631691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506970.

The product of its digits is 816480, while the sum is 48.

The spelling of 537421631691 in words is "five hundred thirty-seven billion, four hundred twenty-one million, six hundred thirty-one thousand, six hundred ninety-one".