551044643436 has 48 divisors (see below), whose sum is σ = 1632724871680. Its totient is φ = 157441326480.

The previous prime is 551044643419. The next prime is 551044643453. The reversal of 551044643436 is 634346440155.

551044643436 is a `hidden beast` number, since 5 + 510 + 44 + 64 + 3 + 4 + 36 = 666.

It is an interprime number because it is at equal distance from previous prime (551044643419) and next prime (551044643453).

It is a junction number, because it is equal to n+sod(n) for n = 551044643391 and 551044643400.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364446760 + ... + 364448271.

Almost surely, 2^551044643436 is an apocalyptic number.

It is an amenable number.

551044643436 is an abundant number, since it is smaller than the sum of its proper divisors (1081680228244).

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

551044643436 is a wasteful number, since it uses less digits than its factorization.

551044643436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728895051 (or 728895043 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 551044643436 in words is "five hundred fifty-one billion, forty-four million, six hundred forty-three thousand, four hundred thirty-six".