70471447381 has 4 divisors (see below), whose sum is σ = 72376081132. Its totient is φ = 68566813632.

The previous prime is 70471447363. The next prime is 70471447421. The reversal of 70471447381 is 18374417407.

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 59650246756 + 10821200625 = 244234^2 + 104025^2 .

It is a cyclic number.

It is not a de Polignac number, because 70471447381 - 2⁷ = 70471447253 is a prime.

It is a super-2 number, since 2×70471447381² (a number of 22 digits) 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 (70475447381) 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, 952316820 + ... + 952316893.

It is an arithmetic number, because the mean of its divisors is an integer number (18094020283).

Almost surely, 2^70471447381 is an apocalyptic number.

It is an amenable number.

70471447381 is a deficient number, since it is larger than the sum of its proper divisors (1904633751).

70471447381 is a wasteful number, since it uses less digits than its factorization.

70471447381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904633750.

The product of its (nonzero) digits is 526848, while the sum is 46.

The spelling of 70471447381 in words is "seventy billion, four hundred seventy-one million, four hundred forty-seven thousand, three hundred eighty-one".