312161216464 has 10 divisors (see below), whose sum is σ = 604812356930. Its totient is φ = 156080608224.

The previous prime is 312161216459. The next prime is 312161216467. The reversal of 312161216464 is 464612161213.

It can be written as a sum of positive squares in only one way, i.e., 292347838864 + 19813377600 = 540692^2 + 140760^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312161216467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9755037999 + ... + 9755038030.

It is an arithmetic number, because the mean of its divisors is an integer number (60481235693).

Almost surely, 2^312161216464 is an apocalyptic number.

It is an amenable number.

312161216464 is a deficient number, since it is larger than the sum of its proper divisors (292651140466).

312161216464 is a wasteful number, since it uses less digits than its factorization.

312161216464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19510076037 (or 19510076031 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

Adding to 312161216464 its reverse (464612161213), we get a palindrome (776773377677).

The spelling of 312161216464 in words is "three hundred twelve billion, one hundred sixty-one million, two hundred sixteen thousand, four hundred sixty-four".