78202453630478 has 32 divisors (see below), whose sum is σ = 124213295232000. Its totient is φ = 36851933961216.

The previous prime is 78202453630453. The next prime is 78202453630481. The reversal of 78202453630478 is 87403635420287.

It is a super-2 number, since 2×78202453630478² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40527923 + ... + 42413646.

It is an arithmetic number, because the mean of its divisors is an integer number (3881665476000).

Almost surely, 2^{78202453630478} is an apocalyptic number.

78202453630478 is a deficient number, since it is larger than the sum of its proper divisors (46010841601522).

78202453630478 is a wasteful number, since it uses less digits than its factorization.

78202453630478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82941896.

The product of its (nonzero) digits is 54190080, while the sum is 59.

The spelling of 78202453630478 in words is "seventy-eight trillion, two hundred two billion, four hundred fifty-three million, six hundred thirty thousand, four hundred seventy-eight".