10203605556457 has 4 divisors (see below), whose sum is σ = 10370877778756. Its totient is φ = 10036333334160.

The previous prime is 10203605556449. The next prime is 10203605556479. The reversal of 10203605556457 is 75465550630201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4493971770201 + 5709633786256 = 2119899^2 + 2389484^2 .

It is a cyclic number.

It is not a de Polignac number, because 10203605556457 - 2³ = 10203605556449 is a prime.

It is a super-2 number, since 2×10203605556457² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10203605556457.

It is not an unprimeable number, because it can be changed into a prime (10203605556407) 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 3 ways as a sum of consecutive naturals, for example, 83636111058 + ... + 83636111179.

It is an arithmetic number, because the mean of its divisors is an integer number (2592719444689).

Almost surely, 2^{10203605556457} is an apocalyptic number.

It is an amenable number.

10203605556457 is a deficient number, since it is larger than the sum of its proper divisors (167272222299).

10203605556457 is an equidigital number, since it uses as much as digits as its factorization.

10203605556457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167272222298.

The product of its (nonzero) digits is 3780000, while the sum is 49.

The spelling of 10203605556457 in words is "ten trillion, two hundred three billion, six hundred five million, five hundred fifty-six thousand, four hundred fifty-seven".