42777261557 has 8 divisors (see below), whose sum is σ = 43295703360. Its totient is φ = 42260803200.

The previous prime is 42777261539. The next prime is 42777261577. The reversal of 42777261557 is 75516277724.

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-42777261557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42777261499 and 42777261508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42777261577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452444 + ... + 538757.

It is an arithmetic number, because the mean of its divisors is an integer number (5411962920).

Almost surely, 2^42777261557 is an apocalyptic number.

It is an amenable number.

42777261557 is a deficient number, since it is larger than the sum of its proper divisors (518441803).

42777261557 is a wasteful number, since it uses less digits than its factorization.

42777261557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991723.

The product of its digits is 5762400, while the sum is 53.

The spelling of 42777261557 in words is "forty-two billion, seven hundred seventy-seven million, two hundred sixty-one thousand, five hundred fifty-seven".