78256475133748 has 12 divisors (see below), whose sum is σ = 138360675108292. Its totient is φ = 38724853674240.

The previous prime is 78256475133647. The next prime is 78256475133779. The reversal of 78256475133748 is 84733157465287.

It can be written as a sum of positive squares in 2 ways, for example, as 18027513957924 + 60228961175824 = 4245882^2 + 7760732^2 .

It is a super-2 number, since 2×78256475133748² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100845972723 + ... + 100845973498.

Almost surely, 2^{78256475133748} is an apocalyptic number.

It is an amenable number.

78256475133748 is a deficient number, since it is larger than the sum of its proper divisors (60104199974544).

78256475133748 is a wasteful number, since it uses less digits than its factorization.

78256475133748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201691946322 (or 201691946320 counting only the distinct ones).

The product of its digits is 948326400, while the sum is 70.

The spelling of 78256475133748 in words is "seventy-eight trillion, two hundred fifty-six billion, four hundred seventy-five million, one hundred thirty-three thousand, seven hundred forty-eight".