501426805557 has 16 divisors (see below), whose sum is σ = 734355048960. Its totient is φ = 302921456112.

The previous prime is 501426805553. The next prime is 501426805589. The reversal of 501426805557 is 755508624105.

It is not a de Polignac number, because 501426805557 - 2² = 501426805553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501426805553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191236983 + ... + 191239604.

It is an arithmetic number, because the mean of its divisors is an integer number (45897190560).

Almost surely, 2^501426805557 is an apocalyptic number.

501426805557 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

501426805557 is a deficient number, since it is larger than the sum of its proper divisors (232928243403).

501426805557 is a wasteful number, since it uses less digits than its factorization.

501426805557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382476632.

The product of its (nonzero) digits is 1680000, while the sum is 48.

The spelling of 501426805557 in words is "five hundred one billion, four hundred twenty-six million, eight hundred five thousand, five hundred fifty-seven".