628461177889 has 8 divisors (see below), whose sum is σ = 640722942720. Its totient is φ = 616253075856.

The previous prime is 628461177887. The next prime is 628461177893. The reversal of 628461177889 is 988771164826.

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

It is a cyclic number.

It is not a de Polignac number, because 628461177889 - 2¹ = 628461177887 is a prime.

It is a super-2 number, since 2×628461177889² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628461177887) 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, 13392049 + ... + 13438894.

It is an arithmetic number, because the mean of its divisors is an integer number (80090367840).

Almost surely, 2^628461177889 is an apocalyptic number.

It is an amenable number.

628461177889 is a deficient number, since it is larger than the sum of its proper divisors (12261764831).

628461177889 is a wasteful number, since it uses less digits than its factorization.

628461177889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26831399.

The product of its digits is 65028096, while the sum is 67.

The spelling of 628461177889 in words is "six hundred twenty-eight billion, four hundred sixty-one million, one hundred seventy-seven thousand, eight hundred eighty-nine".