499251376921 has 8 divisors (see below), whose sum is σ = 573303016800. Its totient is φ = 429977262240.

The previous prime is 499251376919. The next prime is 499251376993. The reversal of 499251376921 is 129673152994.

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 499251376921 - 2¹ = 499251376919 is a prime.

It is a super-2 number, since 2×499251376921² (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 (499251376621) 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, 1194381076 + ... + 1194381493.

It is an arithmetic number, because the mean of its divisors is an integer number (71662877100).

Almost surely, 2^499251376921 is an apocalyptic number.

It is an amenable number.

499251376921 is a deficient number, since it is larger than the sum of its proper divisors (74051639879).

499251376921 is a wasteful number, since it uses less digits than its factorization.

499251376921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388762599.

The product of its digits is 7348320, while the sum is 58.

The spelling of 499251376921 in words is "four hundred ninety-nine billion, two hundred fifty-one million, three hundred seventy-six thousand, nine hundred twenty-one".