4491671971626 has 288 divisors, whose sum is σ = 11818117209600. Its totient is φ = 1207127024640.

The previous prime is 4491671971613. The next prime is 4491671971637. The reversal of 4491671971626 is 6261791761944.

4491671971626 is a `hidden beast` number, since 4 + 491 + 6 + 7 + 19 + 71 + 62 + 6 = 666.

It is a super-3 number, since 3×4491671971626³ (a number of 39 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 847962610 + ... + 847967906.

It is an arithmetic number, because the mean of its divisors is an integer number (41035129200).

Almost surely, 2^{4491671971626} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4491671971626, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5909058604800).

4491671971626 is an abundant number, since it is smaller than the sum of its proper divisors (7326445237974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4491671971626 is a wasteful number, since it uses less digits than its factorization.

4491671971626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570 (or 5536 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 4491671971626 in words is "four trillion, four hundred ninety-one billion, six hundred seventy-one million, nine hundred seventy-one thousand, six hundred twenty-six".