31161642467 has 4 divisors (see below), whose sum is σ = 31172469120. Its totient is φ = 31150815816.

The previous prime is 31161642433. The next prime is 31161642469. The reversal of 31161642467 is 76424616113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31161642467 - 2⁶ = 31161642403 is a prime.

It is a super-3 number, since 3×31161642467³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31161642469) 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, 5409008 + ... + 5414765.

It is an arithmetic number, because the mean of its divisors is an integer number (7793117280).

Almost surely, 2^31161642467 is an apocalyptic number.

31161642467 is a deficient number, since it is larger than the sum of its proper divisors (10826653).

31161642467 is a wasteful number, since it uses less digits than its factorization.

31161642467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10826652.

The product of its digits is 145152, while the sum is 41.

The spelling of 31161642467 in words is "thirty-one billion, one hundred sixty-one million, six hundred forty-two thousand, four hundred sixty-seven".