1097257469780 has 24 divisors (see below), whose sum is σ = 2304661628808. Its totient is φ = 438822808448.

The previous prime is 1097257469773. The next prime is 1097257469783. The reversal of 1097257469780 is 879647527901.

It can be written as a sum of positive squares in 4 ways, for example, as 570091441936 + 527166027844 = 755044^2 + 726062^2 .

It is a super-2 number, since 2×1097257469780² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097257469783) 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 in 7 ways as a sum of consecutive naturals, for example, 4898939 + ... + 5118018.

It is an arithmetic number, because the mean of its divisors is an integer number (96027567867).

Almost surely, 2^{1097257469780} is an apocalyptic number.

1097257469780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1097257469780 is an abundant number, since it is smaller than the sum of its proper divisors (1207404159028).

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

1097257469780 is a wasteful number, since it uses less digits than its factorization.

1097257469780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10022443 (or 10022441 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 65.

The spelling of 1097257469780 in words is "one trillion, ninety-seven billion, two hundred fifty-seven million, four hundred sixty-nine thousand, seven hundred eighty".