312161781460 has 24 divisors (see below), whose sum is σ = 655789961736. Its totient is φ = 124817051520.

The previous prime is 312161781401. The next prime is 312161781509. The reversal of 312161781460 is 64187161213.

It can be written as a sum of positive squares in 4 ways, for example, as 3930286864 + 308231494596 = 62692^2 + 555186^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2925087 + ... + 3029926.

It is an arithmetic number, because the mean of its divisors is an integer number (27324581739).

Almost surely, 2^312161781460 is an apocalyptic number.

It is an amenable number.

312161781460 is an abundant number, since it is smaller than the sum of its proper divisors (343628180276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312161781460 is a wasteful number, since it uses less digits than its factorization.

312161781460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5957643 (or 5957641 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 312161781460 in words is "three hundred twelve billion, one hundred sixty-one million, seven hundred eighty-one thousand, four hundred sixty".