34520385437 has 4 divisors (see below), whose sum is σ = 34520896956. Its totient is φ = 34519873920.

The previous prime is 34520385397. The next prime is 34520385463. The reversal of 34520385437 is 73458302543.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73458302543 = 23 ⋅3193839241.

It can be written as a sum of positive squares in 2 ways, for example, as 867950521 + 33652434916 = 29461^2 + 183446^2 .

It is a cyclic number.

It is not a de Polignac number, because 34520385437 - 2⁶ = 34520385373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34520385037) 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, 135764 + ... + 295757.

It is an arithmetic number, because the mean of its divisors is an integer number (8630224239).

Almost surely, 2^34520385437 is an apocalyptic number.

It is an amenable number.

34520385437 is a deficient number, since it is larger than the sum of its proper divisors (511519).

34520385437 is an equidigital number, since it uses as much as digits as its factorization.

34520385437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511518.

The product of its (nonzero) digits is 1209600, while the sum is 44.

The spelling of 34520385437 in words is "thirty-four billion, five hundred twenty million, three hundred eighty-five thousand, four hundred thirty-seven".