70347237181 has 4 divisors (see below), whose sum is σ = 75758563132. Its totient is φ = 64935911232.

The previous prime is 70347237179. The next prime is 70347237221. The reversal of 70347237181 is 18173274307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18173274307 = 15817 ⋅1148971.

It can be written as a sum of positive squares in 2 ways, for example, as 5594292025 + 64752945156 = 74795^2 + 254466^2 .

It is a cyclic number.

It is not a de Polignac number, because 70347237181 - 2¹ = 70347237179 is a prime.

It is a super-2 number, since 2×70347237181² (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 (70347237101) 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, 2705662956 + ... + 2705662981.

It is an arithmetic number, because the mean of its divisors is an integer number (18939640783).

Almost surely, 2^70347237181 is an apocalyptic number.

It is an amenable number.

70347237181 is a deficient number, since it is larger than the sum of its proper divisors (5411325951).

70347237181 is a wasteful number, since it uses less digits than its factorization.

70347237181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411325950.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 70347237181 in words is "seventy billion, three hundred forty-seven million, two hundred thirty-seven thousand, one hundred eighty-one".