70138263881 has 4 divisors (see below), whose sum is σ = 80158015872. Its totient is φ = 60118511892.

The previous prime is 70138263869. The next prime is 70138263917. The reversal of 70138263881 is 18836283107.

It is a happy number.

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: 18836283107 = 47 ⋅400771981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70138263881 is a prime.

It is a super-2 number, since 2×70138263881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70138263781) 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, 5009875985 + ... + 5009875998.

It is an arithmetic number, because the mean of its divisors is an integer number (20039503968).

Almost surely, 2^70138263881 is an apocalyptic number.

It is an amenable number.

70138263881 is a deficient number, since it is larger than the sum of its proper divisors (10019751991).

70138263881 is a wasteful number, since it uses less digits than its factorization.

70138263881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10019751990.

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 70138263881 in words is "seventy billion, one hundred thirty-eight million, two hundred sixty-three thousand, eight hundred eighty-one".