7371082978561 has 4 divisors (see below), whose sum is σ = 7371088772692. Its totient is φ = 7371077184432.

The previous prime is 7371082978517. The next prime is 7371082978573. The reversal of 7371082978561 is 1658792801737.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5139289000000 + 2231793978561 = 2267000^2 + 1493919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7371082978561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7371082978493 and 7371082978502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67806 + ... + 3840151.

It is an arithmetic number, because the mean of its divisors is an integer number (1842772193173).

Almost surely, 2^{7371082978561} is an apocalyptic number.

It is an amenable number.

7371082978561 is a deficient number, since it is larger than the sum of its proper divisors (5794131).

7371082978561 is a wasteful number, since it uses less digits than its factorization.

7371082978561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5794130.

The product of its (nonzero) digits is 35562240, while the sum is 64.

The spelling of 7371082978561 in words is "seven trillion, three hundred seventy-one billion, eighty-two million, nine hundred seventy-eight thousand, five hundred sixty-one".