7923940078541 has 4 divisors (see below), whose sum is σ = 7925386322400. Its totient is φ = 7922493834684.

The previous prime is 7923940078517. The next prime is 7923940078543. The reversal of 7923940078541 is 1458700493297.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7923940078541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7923940078543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723113711 + ... + 723124668.

It is an arithmetic number, because the mean of its divisors is an integer number (1981346580600).

Almost surely, 2^{7923940078541} is an apocalyptic number.

It is an amenable number.

7923940078541 is a deficient number, since it is larger than the sum of its proper divisors (1446243859).

7923940078541 is a wasteful number, since it uses less digits than its factorization.

7923940078541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446243858.

The product of its (nonzero) digits is 15240960, while the sum is 59.

The spelling of 7923940078541 in words is "seven trillion, nine hundred twenty-three billion, nine hundred forty million, seventy-eight thousand, five hundred forty-one".