63400783536 has 160 divisors (see below), whose sum is σ = 193073356800. Its totient is φ = 19863325440.

The previous prime is 63400783531. The next prime is 63400783541. The reversal of 63400783536 is 63538700436.

63400783536 is a `hidden beast` number, since 6 + 3 + 40 + 0 + 78 + 3 + 536 = 666.

It is an interprime number because it is at equal distance from previous prime (63400783531) and next prime (63400783541).

It is a junction number, because it is equal to n+sod(n) for n = 63400783491 and 63400783500.

It is not an unprimeable number, because it can be changed into a prime (63400783531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1012006 + ... + 1072826.

It is an arithmetic number, because the mean of its divisors is an integer number (1206708480).

Almost surely, 2^63400783536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63400783536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96536678400).

63400783536 is an abundant number, since it is smaller than the sum of its proper divisors (129672573264).

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

63400783536 is a wasteful number, since it uses less digits than its factorization.

63400783536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60984 (or 60972 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 63400783536 in words is "sixty-three billion, four hundred million, seven hundred eighty-three thousand, five hundred thirty-six".