31461855816413 has 16 divisors (see below), whose sum is σ = 35431273912320. Its totient is φ = 27677421332400.

The previous prime is 31461855816361. The next prime is 31461855816431.

31461855816413 is nontrivially palindromic in base 10.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31461855816413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31461855818413) 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, 3096878 + ... + 8515536.

It is an arithmetic number, because the mean of its divisors is an integer number (2214454619520).

Almost surely, 2^{31461855816413} is an apocalyptic number.

It is an amenable number.

31461855816413 is a deficient number, since it is larger than the sum of its proper divisors (3969418095907).

31461855816413 is a wasteful number, since it uses less digits than its factorization.

31461855816413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435728.

The product of its digits is 8294400, while the sum is 56.

The spelling of 31461855816413 in words is "thirty-one trillion, four hundred sixty-one billion, eight hundred fifty-five million, eight hundred sixteen thousand, four hundred thirteen".