201256366451 has 4 divisors (see below), whose sum is σ = 230007275952. Its totient is φ = 172505456952.

The previous prime is 201256366291. The next prime is 201256366489. The reversal of 201256366451 is 154663652102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154663652102 = 2 ⋅77331826051.

It is a cyclic number.

It is not a de Polignac number, because 201256366451 - 2³⁰ = 200182624627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201256366399 and 201256366408.

It is not an unprimeable number, because it can be changed into a prime (201256386451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14375454740 + ... + 14375454753.

It is an arithmetic number, because the mean of its divisors is an integer number (57501818988).

Almost surely, 2^201256366451 is an apocalyptic number.

201256366451 is a deficient number, since it is larger than the sum of its proper divisors (28750909501).

201256366451 is an equidigital number, since it uses as much as digits as its factorization.

201256366451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28750909500.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 201256366451 in words is "two hundred one billion, two hundred fifty-six million, three hundred sixty-six thousand, four hundred fifty-one".