210426575640 has 128 divisors (see below), whose sum is σ = 634956433920. Its totient is φ = 55787648000.

The previous prime is 210426575633. The next prime is 210426575657. The reversal of 210426575640 is 46575624012.

210426575640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 210426575592 and 210426575601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20724565 + ... + 20734715.

It is an arithmetic number, because the mean of its divisors is an integer number (4960597140).

Almost surely, 2^210426575640 is an apocalyptic number.

210426575640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210426575640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317478216960).

210426575640 is an abundant number, since it is smaller than the sum of its proper divisors (424529858280).

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

210426575640 is a wasteful number, since it uses less digits than its factorization.

210426575640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11153 (or 11149 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 42.

The spelling of 210426575640 in words is "two hundred ten billion, four hundred twenty-six million, five hundred seventy-five thousand, six hundred forty".