70816549 has 4 divisors (see below), whose sum is σ = 71134336. Its totient is φ = 70498764.

The previous prime is 70816541. The next prime is 70816561. The reversal of 70816549 is 94561807.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94561807 = 149 ⋅634643.

It is a cyclic number.

It is not a de Polignac number, because 70816549 - 2³ = 70816541 is a prime.

It is a super-2 number, since 2×70816549² = 10029967224538802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70816541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158559 + ... + 159004.

It is an arithmetic number, because the mean of its divisors is an integer number (17783584).

Almost surely, 2^70816549 is an apocalyptic number.

It is an amenable number.

70816549 is a deficient number, since it is larger than the sum of its proper divisors (317787).

70816549 is a wasteful number, since it uses less digits than its factorization.

70816549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317786.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 70816549 is about 8415.2569182408. The cubic root of 70816549 is about 413.7248301760.

The spelling of 70816549 in words is "seventy million, eight hundred sixteen thousand, five hundred forty-nine".