1240577863661 has 8 divisors (see below), whose sum is σ = 1241172536448. Its totient is φ = 1239983316000.

The previous prime is 1240577863627. The next prime is 1240577863673. The reversal of 1240577863661 is 1663687750421.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240577863661 - 2⁶ = 1240577863597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240577863597 and 1240577863606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240577863561) 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, 24072041 + ... + 24123521.

It is an arithmetic number, because the mean of its divisors is an integer number (155146567056).

Almost surely, 2^{1240577863661} is an apocalyptic number.

It is an amenable number.

1240577863661 is a deficient number, since it is larger than the sum of its proper divisors (594672787).

1240577863661 is an equidigital number, since it uses as much as digits as its factorization.

1240577863661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62563.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 1240577863661 in words is "one trillion, two hundred forty billion, five hundred seventy-seven million, eight hundred sixty-three thousand, six hundred sixty-one".