81946353362 has 16 divisors (see below), whose sum is σ = 124977404952. Its totient is φ = 40287678720.

The previous prime is 81946353347. The next prime is 81946353439. The reversal of 81946353362 is 26335364918.

It can be written as a sum of positive squares in 4 ways, for example, as 22512301681 + 59434051681 = 150041^2 + 243791^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81946353362.

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, 247178 + ... + 474330.

Almost surely, 2^81946353362 is an apocalyptic number.

81946353362 is a deficient number, since it is larger than the sum of its proper divisors (43031051590).

81946353362 is a wasteful number, since it uses less digits than its factorization.

81946353362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230173.

The product of its digits is 2799360, while the sum is 50.

The spelling of 81946353362 in words is "eighty-one billion, nine hundred forty-six million, three hundred fifty-three thousand, three hundred sixty-two".