220153636840 has 16 divisors (see below), whose sum is σ = 495345682980. Its totient is φ = 88061454720.

The previous prime is 220153636831. The next prime is 220153636877. The reversal of 220153636840 is 48636351022.

It can be written as a sum of positive squares in 2 ways, for example, as 204577099204 + 15576537636 = 452302^2 + 124806^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 5503840921 = 220153636840 / (2 + 2 + 0 + 1 + 5 + 3 + 6 + 3 + 6 + 8 + 4 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 220153636793 and 220153636802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2751920421 + ... + 2751920500.

Almost surely, 2^220153636840 is an apocalyptic number.

220153636840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220153636840 is an abundant number, since it is smaller than the sum of its proper divisors (275192046140).

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

220153636840 is a wasteful number, since it uses less digits than its factorization.

220153636840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5503840932 (or 5503840928 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 220153636840 its reverse (48636351022), we get a palindrome (268789987862).

The spelling of 220153636840 in words is "two hundred twenty billion, one hundred fifty-three million, six hundred thirty-six thousand, eight hundred forty".