77571330641 has 8 divisors (see below), whose sum is σ = 88654829760. Its totient is φ = 66488301648.

The previous prime is 77571330607. The next prime is 77571330679. The reversal of 77571330641 is 14603317577.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77571330641 is a prime.

It is a super-2 number, since 2×77571330641² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77571330592 and 77571330601.

It is not an unprimeable number, because it can be changed into a prime (77571330691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371975 + ... + 541763.

It is an arithmetic number, because the mean of its divisors is an integer number (11081853720).

Almost surely, 2^77571330641 is an apocalyptic number.

It is an amenable number.

77571330641 is a deficient number, since it is larger than the sum of its proper divisors (11083499119).

77571330641 is a wasteful number, since it uses less digits than its factorization.

77571330641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235063.

The product of its (nonzero) digits is 370440, while the sum is 44.

The spelling of 77571330641 in words is "seventy-seven billion, five hundred seventy-one million, three hundred thirty thousand, six hundred forty-one".