1272613603698 has 20 divisors (see below), whose sum is σ = 2851597149390. Its totient is φ = 424204534512.

The previous prime is 1272613603693. The next prime is 1272613603741. The reversal of 1272613603698 is 8963063162721.

1272613603698 is a `hidden beast` number, since 1 + 2 + 7 + 26 + 1 + 3 + 603 + 6 + 9 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1186175839689 + 86437764009 = 1089117^2 + 294003^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1272613603693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3927819603 + ... + 3927819926.

Almost surely, 2^{1272613603698} is an apocalyptic number.

1272613603698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1272613603698 is an abundant number, since it is smaller than the sum of its proper divisors (1578983545692).

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

1272613603698 is an equidigital number, since it uses as much as digits as its factorization.

1272613603698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855639543 (or 7855639534 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 1272613603698 in words is "one trillion, two hundred seventy-two billion, six hundred thirteen million, six hundred three thousand, six hundred ninety-eight".