975784487578 has 4 divisors (see below), whose sum is σ = 1463676731370. Its totient is φ = 487892243788.

The previous prime is 975784487497. The next prime is 975784487581. The reversal of 975784487578 is 875784487579.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 875784487579 = 8429 ⋅103901351.

It can be written as a sum of positive squares in only one way, i.e., 846589530609 + 129194956969 = 920103^2 + 359437^2 .

It is a junction number, because it is equal to n+sod(n) for n = 975784487498 and 975784487507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243946121893 + ... + 243946121896.

Almost surely, 2^975784487578 is an apocalyptic number.

975784487578 is a deficient number, since it is larger than the sum of its proper divisors (487892243792).

975784487578 is a wasteful number, since it uses less digits than its factorization.

975784487578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487892243791.

The product of its digits is 4425523200, while the sum is 79.

Subtracting from 975784487578 its reverse (875784487579), we obtain a palindrome (99999999999).

The spelling of 975784487578 in words is "nine hundred seventy-five billion, seven hundred eighty-four million, four hundred eighty-seven thousand, five hundred seventy-eight".