163263780 has 36 divisors (see below), whose sum is σ = 495234012. Its totient is φ = 43536960.

The previous prime is 163263761. The next prime is 163263787. The reversal of 163263780 is 87362361.

It is a happy number.

163263780 is a `hidden beast` number, since 16 + 3 + 2 + 637 + 8 + 0 = 666.

163263780 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 74753316 + 88510464 = 8646^2 + 9408^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (163263787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453331 + ... + 453690.

Almost surely, 2^163263780 is an apocalyptic number.

163263780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163263780 is an abundant number, since it is smaller than the sum of its proper divisors (331970232).

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

163263780 is a wasteful number, since it uses less digits than its factorization.

163263780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907036 (or 907031 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 163263780 is about 12777.4715808723. The cubic root of 163263780 is about 546.5500635369.

The spelling of 163263780 in words is "one hundred sixty-three million, two hundred sixty-three thousand, seven hundred eighty".