2978078319761 has 8 divisors (see below), whose sum is σ = 3154739144544. Its totient is φ = 2801581911360.

The previous prime is 2978078319683. The next prime is 2978078319767. The reversal of 2978078319761 is 1679138708792.

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 2978078319761 - 2¹⁰ = 2978078318737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2978078319691 and 2978078319700.

It is not an unprimeable number, because it can be changed into a prime (2978078319767) 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, 41066795 + ... + 41139248.

It is an arithmetic number, because the mean of its divisors is an integer number (394342393068).

Almost surely, 2^{2978078319761} is an apocalyptic number.

It is an amenable number.

2978078319761 is a deficient number, since it is larger than the sum of its proper divisors (176660824783).

2978078319761 is a wasteful number, since it uses less digits than its factorization.

2978078319761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82208191.

The product of its (nonzero) digits is 64012032, while the sum is 68.

The spelling of 2978078319761 in words is "two trillion, nine hundred seventy-eight billion, seventy-eight million, three hundred nineteen thousand, seven hundred sixty-one".