499721668740 has 288 divisors, whose sum is σ = 1825178584320. Its totient is φ = 108113522688.

The previous prime is 499721668727. The next prime is 499721668753. The reversal of 499721668740 is 47866127994.

499721668740 is a `hidden beast` number, since 499 + 7 + 2 + 1 + 66 + 87 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (499721668727) and next prime (499721668753).

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 95 ways as a sum of consecutive naturals, for example, 28551672 + ... + 28569168.

It is an arithmetic number, because the mean of its divisors is an integer number (6337425640).

Almost surely, 2^499721668740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499721668740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (912589292160).

499721668740 is an abundant number, since it is smaller than the sum of its proper divisors (1325456915580).

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

499721668740 is a wasteful number, since it uses less digits than its factorization.

499721668740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18731 (or 18726 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 499721668740 in words is "four hundred ninety-nine billion, seven hundred twenty-one million, six hundred sixty-eight thousand, seven hundred forty".