1578778680353 has 4 divisors (see below), whose sum is σ = 1804318491840. Its totient is φ = 1353238868868.

The previous prime is 1578778680251. The next prime is 1578778680373. The reversal of 1578778680353 is 3530868778751.

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 not a de Polignac number, because 1578778680353 - 2⁸ = 1578778680097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1578778680373) 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, 112769905733 + ... + 112769905746.

It is an arithmetic number, because the mean of its divisors is an integer number (451079622960).

Almost surely, 2^{1578778680353} is an apocalyptic number.

It is an amenable number.

1578778680353 is a deficient number, since it is larger than the sum of its proper divisors (225539811487).

1578778680353 is an equidigital number, since it uses as much as digits as its factorization.

1578778680353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225539811486.

The product of its (nonzero) digits is 237081600, while the sum is 68.

The spelling of 1578778680353 in words is "one trillion, five hundred seventy-eight billion, seven hundred seventy-eight million, six hundred eighty thousand, three hundred fifty-three".