1245056440690 has 64 divisors (see below), whose sum is σ = 2369005056000. Its totient is φ = 470509079040.

The previous prime is 1245056440681. The next prime is 1245056440723. The reversal of 1245056440690 is 960446505421.

It is a super-2 number, since 2×1245056440690² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1245056440690.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1893996 + ... + 2465224.

It is an arithmetic number, because the mean of its divisors is an integer number (37015704000).

Almost surely, 2^{1245056440690} is an apocalyptic number.

1245056440690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1245056440690 is a deficient number, since it is larger than the sum of its proper divisors (1123948615310).

1245056440690 is a wasteful number, since it uses less digits than its factorization.

1245056440690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571435.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 1245056440690 in words is "one trillion, two hundred forty-five billion, fifty-six million, four hundred forty thousand, six hundred ninety".