671551267761 has 96 divisors (see below), whose sum is σ = 1139302195200. Its totient is φ = 377119416960.

The previous prime is 671551267729. The next prime is 671551267787. The reversal of 671551267761 is 167762155176.

671551267761 is a `hidden beast` number, since 6 + 7 + 1 + 5 + 512 + 67 + 7 + 61 = 666.

671551267761 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 671551267761 - 2⁵ = 671551267729 is a prime.

It is a super-2 number, since 2×671551267761² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 671551267698 and 671551267707.

It is not an unprimeable number, because it can be changed into a prime (671551967761) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9498580 + ... + 9569018.

It is an arithmetic number, because the mean of its divisors is an integer number (11867731200).

Almost surely, 2^671551267761 is an apocalyptic number.

It is an amenable number.

671551267761 is a deficient number, since it is larger than the sum of its proper divisors (467750927439).

671551267761 is a wasteful number, since it uses less digits than its factorization.

671551267761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70611 (or 70608 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

The spelling of 671551267761 in words is "six hundred seventy-one billion, five hundred fifty-one million, two hundred sixty-seven thousand, seven hundred sixty-one".