426621235643550 has 72 divisors (see below), whose sum is σ = 1146212136988464. Its totient is φ = 113763371633280.

The previous prime is 426621235643539. The next prime is 426621235643573. The reversal of 426621235643550 is 55346532126624.

426621235643550 is a `hidden beast` number, since 4 + 2 + 6 + 6 + 2 + 1 + 23 + 5 + 64 + 3 + 550 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12880554 + ... + 31924146.

Almost surely, 2^{426621235643550} is an apocalyptic number.

426621235643550 is an abundant number, since it is smaller than the sum of its proper divisors (719590901344914).

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

426621235643550 is a wasteful number, since it uses less digits than its factorization.

426621235643550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19093394 (or 19093386 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 54.

The spelling of 426621235643550 in words is "four hundred twenty-six trillion, six hundred twenty-one billion, two hundred thirty-five million, six hundred forty-three thousand, five hundred fifty".