78572863172903 has 4 divisors (see below), whose sum is σ = 85715850734088. Its totient is φ = 71429875611720.

The previous prime is 78572863172893. The next prime is 78572863172911. The reversal of 78572863172903 is 30927136827587.

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

It is a cyclic number.

It is not a de Polignac number, because 78572863172903 - 2⁴⁶ = 8204118995239 is a prime.

It is a super-3 number, since 3×78572863172903³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78572863072903) 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, 3571493780576 + ... + 3571493780597.

It is an arithmetic number, because the mean of its divisors is an integer number (21428962683522).

Almost surely, 2^{78572863172903} is an apocalyptic number.

78572863172903 is a deficient number, since it is larger than the sum of its proper divisors (7142987561185).

78572863172903 is a wasteful number, since it uses less digits than its factorization.

78572863172903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142987561184.

The product of its (nonzero) digits is 213373440, while the sum is 68.

The spelling of 78572863172903 in words is "seventy-eight trillion, five hundred seventy-two billion, eight hundred sixty-three million, one hundred seventy-two thousand, nine hundred three".