78507457466801 has 4 divisors (see below), whose sum is σ = 85644499054704. Its totient is φ = 71370415878900.

The previous prime is 78507457466783. The next prime is 78507457466813. The reversal of 78507457466801 is 10866475470587.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78507457466801 - 2³⁸ = 78232579559857 is a prime.

It is a super-3 number, since 3×78507457466801³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78507457466881) 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, 3568520793935 + ... + 3568520793956.

It is an arithmetic number, because the mean of its divisors is an integer number (21411124763676).

Almost surely, 2^{78507457466801} is an apocalyptic number.

It is an amenable number.

78507457466801 is a deficient number, since it is larger than the sum of its proper divisors (7137041587903).

78507457466801 is a wasteful number, since it uses less digits than its factorization.

78507457466801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7137041587902.

The product of its (nonzero) digits is 316108800, while the sum is 68.

The spelling of 78507457466801 in words is "seventy-eight trillion, five hundred seven billion, four hundred fifty-seven million, four hundred sixty-six thousand, eight hundred one".