42051363840 has 528 divisors, whose sum is σ = 153504169728. Its totient is φ = 11036196864.

The previous prime is 42051363821. The next prime is 42051363853. The reversal of 42051363840 is 4836315024.

42051363840 is a `hidden beast` number, since 4 + 2 + 0 + 5 + 13 + 638 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 42051363795 and 42051363804.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90823449 + ... + 90823911.

Almost surely, 2^42051363840 is an apocalyptic number.

42051363840 is a gapful number since it is divisible by the number (40) 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 42051363840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76752084864).

42051363840 is an abundant number, since it is smaller than the sum of its proper divisors (111452805888).

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

42051363840 is an equidigital number, since it uses as much as digits as its factorization.

42051363840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 546 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 42051363840 its reverse (4836315024), we get a palindrome (46887678864).

The spelling of 42051363840 in words is "forty-two billion, fifty-one million, three hundred sixty-three thousand, eight hundred forty".