1726641961 has 16 divisors (see below), whose sum is σ = 1929339648. Its totient is φ = 1531763200.

The previous prime is 1726641953. The next prime is 1726641977. The reversal of 1726641961 is 1691466271.

It is not a de Polignac number, because 1726641961 - 2³ = 1726641953 is a prime.

It is a super-2 number, since 2×1726641961² = 5962584922971851042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1726641911) 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, 177771 + ... + 187231.

It is an arithmetic number, because the mean of its divisors is an integer number (120583728).

Almost surely, 2^1726641961 is an apocalyptic number.

1726641961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1726641961 is a deficient number, since it is larger than the sum of its proper divisors (202697687).

1726641961 is a wasteful number, since it uses less digits than its factorization.

1726641961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9872.

The product of its digits is 108864, while the sum is 43.

The square root of 1726641961 is about 41552.8815005650. The cubic root of 1726641961 is about 1199.6855567321.

The spelling of 1726641961 in words is "one billion, seven hundred twenty-six million, six hundred forty-one thousand, nine hundred sixty-one".