1242553615773 has 16 divisors (see below), whose sum is σ = 1728853163520. Its totient is φ = 792315027504.

The previous prime is 1242553615757. The next prime is 1242553615811. The reversal of 1242553615773 is 3775163552421.

It is not a de Polignac number, because 1242553615773 - 2⁴ = 1242553615757 is a prime.

It is a super-2 number, since 2×1242553615773² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242553685773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1053990 + ... + 1896312.

It is an arithmetic number, because the mean of its divisors is an integer number (108053322720).

Almost surely, 2^{1242553615773} is an apocalyptic number.

It is an amenable number.

1242553615773 is a deficient number, since it is larger than the sum of its proper divisors (486299547747).

1242553615773 is a wasteful number, since it uses less digits than its factorization.

1242553615773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863728.

The product of its digits is 5292000, while the sum is 51.

The spelling of 1242553615773 in words is "one trillion, two hundred forty-two billion, five hundred fifty-three million, six hundred fifteen thousand, seven hundred seventy-three".