537698220809 has 4 divisors (see below), whose sum is σ = 538251978960. Its totient is φ = 537144462660.

The previous prime is 537698220757. The next prime is 537698220881. The reversal of 537698220809 is 908022896735.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537698220809 is a prime.

It is a super-2 number, since 2×537698220809² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537698223809) 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, 276877619 + ... + 276879560.

It is an arithmetic number, because the mean of its divisors is an integer number (134562994740).

Almost surely, 2^537698220809 is an apocalyptic number.

It is an amenable number.

537698220809 is a deficient number, since it is larger than the sum of its proper divisors (553758151).

537698220809 is an equidigital number, since it uses as much as digits as its factorization.

537698220809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553758150.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 537698220809 in words is "five hundred thirty-seven billion, six hundred ninety-eight million, two hundred twenty thousand, eight hundred nine".