6356897820 has 720 divisors, whose sum is σ = 25712805888. Its totient is φ = 1285839360.

The previous prime is 6356897809. The next prime is 6356897831. The reversal of 6356897820 is 287986536.

It is a happy number.

6356897820 is a `hidden beast` number, since 6 + 3 + 568 + 9 + 78 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (6356897809) and next prime (6356897831).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 59410207 + ... + 59410313.

Almost surely, 2^6356897820 is an apocalyptic number.

6356897820 is a gapful number since it is divisible by the number (60) 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 6356897820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12856402944).

6356897820 is an abundant number, since it is smaller than the sum of its proper divisors (19355908068).

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

6356897820 is a wasteful number, since it uses less digits than its factorization.

6356897820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The square root of 6356897820 is about 79730.1562772832. The cubic root of 6356897820 is about 1852.4581708007.

The spelling of 6356897820 in words is "six billion, three hundred fifty-six million, eight hundred ninety-seven thousand, eight hundred twenty".