1020155135535 has 12 divisors (see below), whose sum is σ = 1768268901672. Its totient is φ = 544082738928.

The previous prime is 1020155135521. The next prime is 1020155135563. The reversal of 1020155135535 is 5355315510201.

1020155135535 is a `hidden beast` number, since 1 + 0 + 20 + 1 + 551 + 3 + 55 + 35 = 666.

It is not a de Polignac number, because 1020155135535 - 2⁹ = 1020155135023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020155135535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11335057017 + ... + 11335057106.

It is an arithmetic number, because the mean of its divisors is an integer number (147355741806).

Almost surely, 2^{1020155135535} is an apocalyptic number.

1020155135535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020155135535 is a deficient number, since it is larger than the sum of its proper divisors (748113766137).

1020155135535 is a wasteful number, since it uses less digits than its factorization.

1020155135535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22670114134 (or 22670114131 counting only the distinct ones).

The product of its (nonzero) digits is 56250, while the sum is 36.

The spelling of 1020155135535 in words is "one trillion, twenty billion, one hundred fifty-five million, one hundred thirty-five thousand, five hundred thirty-five".