78270775474 has 4 divisors (see below), whose sum is σ = 117406163214. Its totient is φ = 39135387736.

The previous prime is 78270775421. The next prime is 78270775477. The reversal of 78270775474 is 47457707287.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47457707287 = 9973 ⋅4758619.

It can be written as a sum of positive squares in only one way, i.e., 71120889225 + 7149886249 = 266685^2 + 84557^2 .

It is a super-2 number, since 2×78270775474² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (78270775477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19567693867 + ... + 19567693870.

Almost surely, 2^78270775474 is an apocalyptic number.

78270775474 is a deficient number, since it is larger than the sum of its proper divisors (39135387740).

78270775474 is a wasteful number, since it uses less digits than its factorization.

78270775474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39135387739.

The product of its (nonzero) digits is 21512960, while the sum is 58.

The spelling of 78270775474 in words is "seventy-eight billion, two hundred seventy million, seven hundred seventy-five thousand, four hundred seventy-four".