2071621749 has 16 divisors (see below), whose sum is σ = 2849347008. Its totient is φ = 1337818752.

The previous prime is 2071621729. The next prime is 2071621763. The reversal of 2071621749 is 9471261702.

It is not a de Polignac number, because 2071621749 - 2¹¹ = 2071619701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2071621729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15912 + ... + 66305.

It is an arithmetic number, because the mean of its divisors is an integer number (178084188).

Almost surely, 2^2071621749 is an apocalyptic number.

It is an amenable number.

2071621749 is a deficient number, since it is larger than the sum of its proper divisors (777725259).

2071621749 is a wasteful number, since it uses less digits than its factorization.

2071621749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82484.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 2071621749 is about 45515.0716686242. The cubic root of 2071621749 is about 1274.7846359811.

The spelling of 2071621749 in words is "two billion, seventy-one million, six hundred twenty-one thousand, seven hundred forty-nine".