2081622757 has 4 divisors (see below), whose sum is σ = 2081759680. Its totient is φ = 2081485836.

The previous prime is 2081622737. The next prime is 2081622773. The reversal of 2081622757 is 7572261802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081622757 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 (2081622737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42333 + ... + 77170.

It is an arithmetic number, because the mean of its divisors is an integer number (520439920).

Almost surely, 2^2081622757 is an apocalyptic number.

It is an amenable number.

2081622757 is a deficient number, since it is larger than the sum of its proper divisors (136923).

2081622757 is a wasteful number, since it uses less digits than its factorization.

2081622757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136922.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 2081622757 is about 45624.8041858812. The cubic root of 2081622757 is about 1276.8327367341.

The spelling of 2081622757 in words is "two billion, eighty-one million, six hundred twenty-two thousand, seven hundred fifty-seven".