90818647019 has 16 divisors (see below), whose sum is σ = 92771892576. Its totient is φ = 88881062400.

The previous prime is 90818646973. The next prime is 90818647057. The reversal of 90818647019 is 91074681809.

It is a cyclic number.

It is not a de Polignac number, because 90818647019 - 2¹² = 90818642923 is a prime.

It is a super-2 number, since 2×90818647019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90818647079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23916629 + ... + 23920425.

It is an arithmetic number, because the mean of its divisors is an integer number (5798243286).

Almost surely, 2^90818647019 is an apocalyptic number.

90818647019 is a deficient number, since it is larger than the sum of its proper divisors (1953245557).

90818647019 is a wasteful number, since it uses less digits than its factorization.

90818647019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 90818647019 in words is "ninety billion, eight hundred eighteen million, six hundred forty-seven thousand, nineteen".