77901938369 has 4 divisors (see below), whose sum is σ = 77907102000. Its totient is φ = 77896774740.

The previous prime is 77901938353. The next prime is 77901938381. The reversal of 77901938369 is 96383910977.

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 77901938369 - 2⁴ = 77901938353 is a prime.

It is a super-2 number, since 2×77901938369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77901938669) 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, 2559119 + ... + 2589380.

It is an arithmetic number, because the mean of its divisors is an integer number (19476775500).

Almost surely, 2^77901938369 is an apocalyptic number.

It is an amenable number.

77901938369 is a deficient number, since it is larger than the sum of its proper divisors (5163631).

77901938369 is a wasteful number, since it uses less digits than its factorization.

77901938369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163630.

The product of its (nonzero) digits is 15431472, while the sum is 62.

The spelling of 77901938369 in words is "seventy-seven billion, nine hundred one million, nine hundred thirty-eight thousand, three hundred sixty-nine".