2061721607 has 8 divisors (see below), whose sum is σ = 2250374160. Its totient is φ = 1873272960.

The previous prime is 2061721601. The next prime is 2061721609. The reversal of 2061721607 is 7061271602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2061721607 - 2⁸ = 2061721351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061721601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29432 + ... + 70637.

It is an arithmetic number, because the mean of its divisors is an integer number (281296770).

Almost surely, 2^2061721607 is an apocalyptic number.

2061721607 is a deficient number, since it is larger than the sum of its proper divisors (188652553).

2061721607 is a wasteful number, since it uses less digits than its factorization.

2061721607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101953.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 2061721607 is about 45406.1846778608. The cubic root of 2061721607 is about 1272.7506889503.

It can be divided in two parts, 20617 and 21607, that added together give a palindrome (42224).

The spelling of 2061721607 in words is "two billion, sixty-one million, seven hundred twenty-one thousand, six hundred seven".