1636772641 has 16 divisors (see below), whose sum is σ = 1881107200. Its totient is φ = 1395092160.

The previous prime is 1636772629. The next prime is 1636772653. The reversal of 1636772641 is 1462776361.

It is an interprime number because it is at equal distance from previous prime (1636772629) and next prime (1636772653).

It is not a de Polignac number, because 1636772641 - 2⁵ = 1636772609 is a prime.

It is a super-2 number, since 2×1636772641² = 5358049356652229762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1636773641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1169260 + ... + 1170658.

It is an arithmetic number, because the mean of its divisors is an integer number (117569200).

Almost surely, 2^1636772641 is an apocalyptic number.

It is an amenable number.

1636772641 is a deficient number, since it is larger than the sum of its proper divisors (244334559).

1636772641 is a wasteful number, since it uses less digits than its factorization.

1636772641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224.

The product of its digits is 254016, while the sum is 43.

The square root of 1636772641 is about 40457.0468645451. The cubic root of 1636772641 is about 1178.4996350429.

The spelling of 1636772641 in words is "one billion, six hundred thirty-six million, seven hundred seventy-two thousand, six hundred forty-one".