6357645420 has 48 divisors (see below), whose sum is σ = 20344466688. Its totient is φ = 1453176000.

The previous prime is 6357645367. The next prime is 6357645421. The reversal of 6357645420 is 245467536.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (6357645421) 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, 7568206 + ... + 7569045.

It is an arithmetic number, because the mean of its divisors is an integer number (423843056).

Almost surely, 2^6357645420 is an apocalyptic number.

6357645420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6357645420 is an abundant number, since it is smaller than the sum of its proper divisors (13986821268).

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

6357645420 is a wasteful number, since it uses less digits than its factorization.

6357645420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15137270 (or 15137268 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 42.

The square root of 6357645420 is about 79734.8444533505. The cubic root of 6357645420 is about 1852.5307871135.

The spelling of 6357645420 in words is "six billion, three hundred fifty-seven million, six hundred forty-five thousand, four hundred twenty".