164790647437 has 4 divisors (see below), whose sum is σ = 177466851100. Its totient is φ = 152114443776.

The previous prime is 164790647429. The next prime is 164790647453. The reversal of 164790647437 is 734746097461.

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 17962968676 + 146827678761 = 134026^2 + 383181^2 .

It is a cyclic number.

It is not a de Polignac number, because 164790647437 - 2³ = 164790647429 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 (164790647537) 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, 6338101812 + ... + 6338101837.

It is an arithmetic number, because the mean of its divisors is an integer number (44366712775).

Almost surely, 2^164790647437 is an apocalyptic number.

It is an amenable number.

164790647437 is a deficient number, since it is larger than the sum of its proper divisors (12676203663).

164790647437 is a wasteful number, since it uses less digits than its factorization.

164790647437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12676203662.

The product of its (nonzero) digits is 21337344, while the sum is 58.

The spelling of 164790647437 in words is "one hundred sixty-four billion, seven hundred ninety million, six hundred forty-seven thousand, four hundred thirty-seven".