70231181691 has 16 divisors (see below), whose sum is σ = 104646019968. Its totient is φ = 41526196800.

The previous prime is 70231181681. The next prime is 70231181693. The reversal of 70231181691 is 19618113207.

It is not a de Polignac number, because 70231181691 - 2⁶ = 70231181627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70231181693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25952521 + ... + 25955226.

It is an arithmetic number, because the mean of its divisors is an integer number (6540376248).

Almost surely, 2^70231181691 is an apocalyptic number.

70231181691 is a deficient number, since it is larger than the sum of its proper divisors (34414838277).

70231181691 is a wasteful number, since it uses less digits than its factorization.

70231181691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51907802.

The product of its (nonzero) digits is 18144, while the sum is 39.

Adding to 70231181691 its reverse (19618113207), we get a palindrome (89849294898).

The spelling of 70231181691 in words is "seventy billion, two hundred thirty-one million, one hundred eighty-one thousand, six hundred ninety-one".