203425606051556 has 36 divisors (see below), whose sum is σ = 414183089473776. Its totient is φ = 87168365298000.

The previous prime is 203425606051541. The next prime is 203425606051571. The reversal of 203425606051556 is 655150606524302.

It is an interprime number because it is at equal distance from previous prime (203425606051541) and next prime (203425606051571).

It is a super-2 number, since 2×203425606051556² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82334870 + ... + 84769581.

It is an arithmetic number, because the mean of its divisors is an integer number (11505085818716).

Almost surely, 2^{203425606051556} is an apocalyptic number.

It is an amenable number.

203425606051556 is an abundant number, since it is smaller than the sum of its proper divisors (210757483422220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203425606051556 is a wasteful number, since it uses less digits than its factorization.

203425606051556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167110680 (or 167110671 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 50.

The spelling of 203425606051556 in words is "two hundred three trillion, four hundred twenty-five billion, six hundred six million, fifty-one thousand, five hundred fifty-six".