78503772801431 has 4 divisors (see below), whose sum is σ = 80329441936392. Its totient is φ = 76678103666472.

The previous prime is 78503772801409. The next prime is 78503772801497. The reversal of 78503772801431 is 13410827730587.

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 78503772801431 - 2¹⁴ = 78503772785047 is a prime.

It is a super-2 number, since 2×78503772801431² (a number of 29 digits) contains 22 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 (78503772801331) 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, 912834567416 + ... + 912834567501.

It is an arithmetic number, because the mean of its divisors is an integer number (20082360484098).

Almost surely, 2^{78503772801431} is an apocalyptic number.

78503772801431 is a deficient number, since it is larger than the sum of its proper divisors (1825669134961).

78503772801431 is a wasteful number, since it uses less digits than its factorization.

78503772801431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825669134960.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 78503772801431 in words is "seventy-eight trillion, five hundred three billion, seven hundred seventy-two million, eight hundred one thousand, four hundred thirty-one".