773878354381 has 4 divisors (see below), whose sum is σ = 844230932064. Its totient is φ = 703525776700.

The previous prime is 773878354369. The next prime is 773878354399. The reversal of 773878354381 is 183453878377.

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 773878354381 - 2⁵ = 773878354349 is a prime.

It is a super-2 number, since 2×773878354381² (a number of 25 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 (773878354351) 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, 35176288825 + ... + 35176288846.

It is an arithmetic number, because the mean of its divisors is an integer number (211057733016).

Almost surely, 2^773878354381 is an apocalyptic number.

It is an amenable number.

773878354381 is a deficient number, since it is larger than the sum of its proper divisors (70352577683).

773878354381 is a wasteful number, since it uses less digits than its factorization.

773878354381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70352577682.

The product of its digits is 94832640, while the sum is 64.

The spelling of 773878354381 in words is "seven hundred seventy-three billion, eight hundred seventy-eight million, three hundred fifty-four thousand, three hundred eighty-one".