1061636401 has 6 divisors (see below), whose sum is σ = 1234964850. Its totient is φ = 909974016.

The previous prime is 1061636371. The next prime is 1061636593. The reversal of 1061636401 is 1046361601.

It can be written as a sum of positive squares in only one way, i.e., 978188176 + 83448225 = 31276^2 + 9135^2 .

It is not a de Polignac number, because 1061636401 - 2⁷ = 1061636273 is a prime.

It is a super-2 number, since 2×1061636401² = 2254143695856465602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1061636401.

It is not an unprimeable number, because it can be changed into a prime (1061636101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10832976 + ... + 10833073.

It is an arithmetic number, because the mean of its divisors is an integer number (205827475).

Almost surely, 2^1061636401 is an apocalyptic number.

It is an amenable number.

1061636401 is a deficient number, since it is larger than the sum of its proper divisors (173328449).

1061636401 is an equidigital number, since it uses as much as digits as its factorization.

1061636401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21666063 (or 21666056 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1061636401 is about 32582.7623291826. The cubic root of 1061636401 is about 1020.1372367569.

The spelling of 1061636401 in words is "one billion, sixty-one million, six hundred thirty-six thousand, four hundred one".