1023518679481 has 15 divisors (see below), whose sum is σ = 1053375142281. Its totient is φ = 994508440056.

The previous prime is 1023518679461. The next prime is 1023518679487. The reversal of 1023518679481 is 1849768153201.

The square root of 1023518679481 is 1011691.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 638175701881 + 385342977600 = 798859^2 + 620760^2 .

It is not a de Polignac number, because 1023518679481 - 2²⁷ = 1023384461753 is a prime.

It is a super-2 number, since 2×1023518679481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023518679487) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1385004610 + ... + 1385005348.

It is a 1-persistent number, because it is pandigital, but 2⋅1023518679481 = 2047037358962 is not.

Almost surely, 2^{1023518679481} is an apocalyptic number.

1023518679481 is the 1011691-st square number.

1023518679481 is the 505846-th centered octagonal number.

It is an amenable number.

1023518679481 is a deficient number, since it is larger than the sum of its proper divisors (29856462800).

1023518679481 is an frugal number, since it uses more digits than its factorization.

1023518679481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 776 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 1023518679481 in words is "one trillion, twenty-three billion, five hundred eighteen million, six hundred seventy-nine thousand, four hundred eighty-one".