6435123380 has 48 divisors (see below), whose sum is σ = 15588671616. Its totient is φ = 2185703040.

The previous prime is 6435123377. The next prime is 6435123413. The reversal of 6435123380 is 833215346.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 6435123380.

It is a congruent number.

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, 199811 + ... + 229770.

It is an arithmetic number, because the mean of its divisors is an integer number (324763992).

Almost surely, 2^6435123380 is an apocalyptic number.

It is an amenable number.

6435123380 is an abundant number, since it is smaller than the sum of its proper divisors (9153548236).

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

6435123380 is a wasteful number, since it uses less digits than its factorization.

6435123380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429704 (or 429702 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6435123380 is about 80219.2207641037. The cubic root of 6435123380 is about 1860.0257617737.

The spelling of 6435123380 in words is "six billion, four hundred thirty-five million, one hundred twenty-three thousand, three hundred eighty".