1026195455999 has 16 divisors (see below), whose sum is σ = 1183786190400. Its totient is φ = 871355729664.

The previous prime is 1026195455993. The next prime is 1026195456023. The reversal of 1026195455999 is 9995545916201.

It is not a de Polignac number, because 1026195455999 - 2⁸ = 1026195455743 is a prime.

It is a super-2 number, since 2×1026195455999² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1026195455993) 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, 3845369 + ... + 4103565.

It is an arithmetic number, because the mean of its divisors is an integer number (73986636900).

Almost surely, 2^{1026195455999} is an apocalyptic number.

1026195455999 is a deficient number, since it is larger than the sum of its proper divisors (157590734401).

1026195455999 is a wasteful number, since it uses less digits than its factorization.

1026195455999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263522.

The product of its (nonzero) digits is 39366000, while the sum is 65.

The spelling of 1026195455999 in words is "one trillion, twenty-six billion, one hundred ninety-five million, four hundred fifty-five thousand, nine hundred ninety-nine".