77990841913 has 4 divisors (see below), whose sum is σ = 78978067840. Its totient is φ = 77003615988.

The previous prime is 77990841883. The next prime is 77990841953. The reversal of 77990841913 is 31914809977.

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 77990841913 - 2¹³ = 77990833721 is a prime.

It is a super-3 number, since 3×77990841913³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77990841953) 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, 493612845 + ... + 493613002.

It is an arithmetic number, because the mean of its divisors is an integer number (19744516960).

Almost surely, 2^77990841913 is an apocalyptic number.

It is an amenable number.

77990841913 is a deficient number, since it is larger than the sum of its proper divisors (987225927).

77990841913 is an equidigital number, since it uses as much as digits as its factorization.

77990841913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987225926.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The spelling of 77990841913 in words is "seventy-seven billion, nine hundred ninety million, eight hundred forty-one thousand, nine hundred thirteen".