511087421640 has 64 divisors (see below), whose sum is σ = 1533390600960. Its totient is φ = 136278571520.

The previous prime is 511087421623. The next prime is 511087421659. The reversal of 511087421640 is 46124780115.

It is a super-2 number, since 2×511087421640² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1313185 + ... + 1657295.

It is an arithmetic number, because the mean of its divisors is an integer number (23959228140).

Almost surely, 2^511087421640 is an apocalyptic number.

It is an amenable number.

511087421640 is an abundant number, since it is smaller than the sum of its proper divisors (1022303179320).

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

511087421640 is a wasteful number, since it uses less digits than its factorization.

511087421640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356502 (or 356498 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 511087421640 in words is "five hundred eleven billion, eighty-seven million, four hundred twenty-one thousand, six hundred forty".