77201643361 has 4 divisors (see below), whose sum is σ = 77294995632. Its totient is φ = 77108291092.

The previous prime is 77201643359. The next prime is 77201643401. The reversal of 77201643361 is 16334610277.

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 77201643361 - 2¹ = 77201643359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77207643361) 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, 46674895 + ... + 46676548.

It is an arithmetic number, because the mean of its divisors is an integer number (19323748908).

Almost surely, 2^77201643361 is an apocalyptic number.

It is an amenable number.

77201643361 is a deficient number, since it is larger than the sum of its proper divisors (93352271).

77201643361 is an equidigital number, since it uses as much as digits as its factorization.

77201643361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93352270.

The product of its (nonzero) digits is 127008, while the sum is 40.

The spelling of 77201643361 in words is "seventy-seven billion, two hundred one million, six hundred forty-three thousand, three hundred sixty-one".