549701972991 has 48 divisors (see below), whose sum is σ = 871299287040. Its totient is φ = 345361942080.

The previous prime is 549701972969. The next prime is 549701972999. The reversal of 549701972991 is 199279107945.

It is a happy number.

549701972991 is a `hidden beast` number, since 549 + 7 + 0 + 19 + 72 + 9 + 9 + 1 = 666.

It is not a de Polignac number, because 549701972991 - 2⁷ = 549701972863 is a prime.

It is a super-2 number, since 2×549701972991² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549701972999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 570171 + ... + 1193523.

It is an arithmetic number, because the mean of its divisors is an integer number (18152068480).

Almost surely, 2^549701972991 is an apocalyptic number.

549701972991 is a deficient number, since it is larger than the sum of its proper divisors (321597314049).

549701972991 is a wasteful number, since it uses less digits than its factorization.

549701972991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623578 (or 623566 counting only the distinct ones).

The product of its (nonzero) digits is 12859560, while the sum is 63.

The spelling of 549701972991 in words is "five hundred forty-nine billion, seven hundred one million, nine hundred seventy-two thousand, nine hundred ninety-one".