70733518681 has 4 divisors (see below), whose sum is σ = 80838307072. Its totient is φ = 60628730292.

The previous prime is 70733518637. The next prime is 70733518697. The reversal of 70733518681 is 18681533707.

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 not a de Polignac number, because 70733518681 - 2⁹ = 70733518169 is a prime.

It is a super-2 number, since 2×70733518681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70733518601) 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, 5052394185 + ... + 5052394198.

It is an arithmetic number, because the mean of its divisors is an integer number (20209576768).

Almost surely, 2^70733518681 is an apocalyptic number.

It is an amenable number.

70733518681 is a deficient number, since it is larger than the sum of its proper divisors (10104788391).

70733518681 is a wasteful number, since it uses less digits than its factorization.

70733518681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10104788390.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 70733518681 in words is "seventy billion, seven hundred thirty-three million, five hundred eighteen thousand, six hundred eighty-one".