2916401781 has 4 divisors (see below), whose sum is σ = 3888535712. Its totient is φ = 1944267852.

The previous prime is 2916401773. The next prime is 2916401783. The reversal of 2916401781 is 1871046192.

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 not a de Polignac number, because 2916401781 - 2³ = 2916401773 is a prime.

It is a super-2 number, since 2×2916401781² = 17010798696439943922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2916401783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486066961 + ... + 486066966.

It is an arithmetic number, because the mean of its divisors is an integer number (972133928).

Almost surely, 2^2916401781 is an apocalyptic number.

It is an amenable number.

2916401781 is a deficient number, since it is larger than the sum of its proper divisors (972133931).

2916401781 is an equidigital number, since it uses as much as digits as its factorization.

2916401781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972133930.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 2916401781 is about 54003.7200663065. The cubic root of 2916401781 is about 1428.7265597644.

The spelling of 2916401781 in words is "two billion, nine hundred sixteen million, four hundred one thousand, seven hundred eighty-one".