78503578354 has 4 divisors (see below), whose sum is σ = 117755367534. Its totient is φ = 39251789176.

The previous prime is 78503578319. The next prime is 78503578369. The reversal of 78503578354 is 45387530587.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70954575129 + 7549003225 = 266373^2 + 86885^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78503578295 and 78503578304.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19625894587 + ... + 19625894590.

Almost surely, 2^78503578354 is an apocalyptic number.

78503578354 is a deficient number, since it is larger than the sum of its proper divisors (39251789180).

78503578354 is a wasteful number, since it uses less digits than its factorization.

78503578354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39251789179.

The product of its (nonzero) digits is 14112000, while the sum is 55.

The spelling of 78503578354 in words is "seventy-eight billion, five hundred three million, five hundred seventy-eight thousand, three hundred fifty-four".