77881000901 has 4 divisors (see below), whose sum is σ = 84961091904. Its totient is φ = 70800909900.

The previous prime is 77881000849. The next prime is 77881000907. The reversal of 77881000901 is 10900018877.

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 77881000901 - 2¹⁰ = 77880999877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77881000907) 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, 3540045485 + ... + 3540045506.

It is an arithmetic number, because the mean of its divisors is an integer number (21240272976).

Almost surely, 2^77881000901 is an apocalyptic number.

It is an amenable number.

77881000901 is a deficient number, since it is larger than the sum of its proper divisors (7080091003).

77881000901 is a wasteful number, since it uses less digits than its factorization.

77881000901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7080091002.

The product of its (nonzero) digits is 28224, while the sum is 41.

The spelling of 77881000901 in words is "seventy-seven billion, eight hundred eighty-one million, nine hundred one", and thus it is an aban number.