1243235045690 has 16 divisors (see below), whose sum is σ = 2441261544480. Its totient is φ = 452085471120.

The previous prime is 1243235045659. The next prime is 1243235045699. The reversal of 1243235045690 is 965405323421.

It is a happy number.

It is a super-2 number, since 2×1243235045690² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1243235045699) 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 7 ways as a sum of consecutive naturals, for example, 5651068280 + ... + 5651068499.

It is an arithmetic number, because the mean of its divisors is an integer number (152578846530).

Almost surely, 2^{1243235045690} is an apocalyptic number.

1243235045690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1243235045690 is a deficient number, since it is larger than the sum of its proper divisors (1198026498790).

1243235045690 is a wasteful number, since it uses less digits than its factorization.

1243235045690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11302136797.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 1243235045690 in words is "one trillion, two hundred forty-three billion, two hundred thirty-five million, forty-five thousand, six hundred ninety".