3118780377661 has 8 divisors (see below), whose sum is σ = 3358710784800. Its totient is φ = 2878853431152.

The previous prime is 3118780377659. The next prime is 3118780377721. The reversal of 3118780377661 is 1667730878113.

It is a happy number.

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 3118780377661 - 2¹ = 3118780377659 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3118780377596 and 3118780377605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3118780377611) 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, 1186890 + ... + 2765188.

It is an arithmetic number, because the mean of its divisors is an integer number (419838848100).

Almost surely, 2^{3118780377661} is an apocalyptic number.

It is an amenable number.

3118780377661 is a deficient number, since it is larger than the sum of its proper divisors (239930407139).

3118780377661 is a wasteful number, since it uses less digits than its factorization.

3118780377661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730315.

The product of its (nonzero) digits is 7112448, while the sum is 58.

The spelling of 3118780377661 in words is "three trillion, one hundred eighteen billion, seven hundred eighty million, three hundred seventy-seven thousand, six hundred sixty-one".