4457751981 has 8 divisors (see below), whose sum is σ = 6135400704. Its totient is φ = 2875968960.

The previous prime is 4457751979. The next prime is 4457752001. The reversal of 4457751981 is 1891577544.

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

It is not a de Polignac number, because 4457751981 - 2¹ = 4457751979 is a prime.

It is a super-2 number, since 2×4457751981² = 39743105448218848722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4457751911) 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, 23966316 + ... + 23966501.

It is an arithmetic number, because the mean of its divisors is an integer number (766925088).

Almost surely, 2^4457751981 is an apocalyptic number.

It is an amenable number.

4457751981 is a deficient number, since it is larger than the sum of its proper divisors (1677648723).

4457751981 is a wasteful number, since it uses less digits than its factorization.

4457751981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47932851.

The product of its digits is 1411200, while the sum is 51.

The square root of 4457751981 is about 66766.3985924057. The cubic root of 4457751981 is about 1645.7807081871.

The spelling of 4457751981 in words is "four billion, four hundred fifty-seven million, seven hundred fifty-one thousand, nine hundred eighty-one".