1261104165362 has 4 divisors (see below), whose sum is σ = 1891656248046. Its totient is φ = 630552082680.

The previous prime is 1261104165361. The next prime is 1261104165367. The reversal of 1261104165362 is 2635614011621.

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

It can be written as a sum of positive squares in only one way, i.e., 784094311081 + 477009854281 = 885491^2 + 690659^2 .

It is not an unprimeable number, because it can be changed into a prime (1261104165361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315276041339 + ... + 315276041342.

Almost surely, 2^{1261104165362} is an apocalyptic number.

1261104165362 is a deficient number, since it is larger than the sum of its proper divisors (630552082684).

1261104165362 is an equidigital number, since it uses as much as digits as its factorization.

1261104165362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630552082683.

The product of its (nonzero) digits is 51840, while the sum is 38.

Adding to 1261104165362 its reverse (2635614011621), we get a palindrome (3896718176983).

The spelling of 1261104165362 in words is "one trillion, two hundred sixty-one billion, one hundred four million, one hundred sixty-five thousand, three hundred sixty-two".