3612778081 has 8 divisors (see below), whose sum is σ = 3959893728. Its totient is φ = 3268776000.

The previous prime is 3612778079. The next prime is 3612778109. The reversal of 3612778081 is 1808772163.

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 3612778081 - 2¹ = 3612778079 is a prime.

It is a super-2 number, since 2×3612778081² = 26104330925108085122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3612778021) 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, 775960 + ... + 780601.

It is an arithmetic number, because the mean of its divisors is an integer number (494986716).

Almost surely, 2^3612778081 is an apocalyptic number.

It is an amenable number.

3612778081 is a deficient number, since it is larger than the sum of its proper divisors (347115647).

3612778081 is a wasteful number, since it uses less digits than its factorization.

3612778081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556783.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 3612778081 is about 60106.3896852905. The cubic root of 3612778081 is about 1534.4300502264.

The spelling of 3612778081 in words is "three billion, six hundred twelve million, seven hundred seventy-eight thousand, eighty-one".