2073857781 has 8 divisors (see below), whose sum is σ = 2765508160. Its totient is φ = 1382389632.

The previous prime is 2073857743. The next prime is 2073857789. The reversal of 2073857781 is 1877583702.

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

It is not a de Polignac number, because 2073857781 - 2⁶ = 2073857717 is a prime.

It is a super-2 number, since 2×2073857781² = 8601772191628487922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2073857781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2073857789) 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, 16321 + ... + 66438.

It is an arithmetic number, because the mean of its divisors is an integer number (345688520).

Almost surely, 2^2073857781 is an apocalyptic number.

It is an amenable number.

2073857781 is a deficient number, since it is larger than the sum of its proper divisors (691650379).

2073857781 is an equidigital number, since it uses as much as digits as its factorization.

2073857781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91115.

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 2073857781 is about 45539.6286875508. The cubic root of 2073857781 is about 1275.2431228799.

The spelling of 2073857781 in words is "two billion, seventy-three million, eight hundred fifty-seven thousand, seven hundred eighty-one".