77434550260991 has 8 divisors (see below), whose sum is σ = 96541776948864. Its totient is φ = 60338610592920.

The previous prime is 77434550260987. The next prime is 77434550260993. The reversal of 77434550260991 is 19906205543477.

It is a happy number.

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

It is not a de Polignac number, because 77434550260991 - 2² = 77434550260987 is a prime.

It is a super-2 number, since 2×77434550260991² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77434550260993) 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, 502821754865 + ... + 502821755018.

It is an arithmetic number, because the mean of its divisors is an integer number (12067722118608).

Almost surely, 2^{77434550260991} is an apocalyptic number.

77434550260991 is a deficient number, since it is larger than the sum of its proper divisors (19107226687873).

77434550260991 is a wasteful number, since it uses less digits than its factorization.

77434550260991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005643509901.

The product of its (nonzero) digits is 57153600, while the sum is 62.

The spelling of 77434550260991 in words is "seventy-seven trillion, four hundred thirty-four billion, five hundred fifty million, two hundred sixty thousand, nine hundred ninety-one".