1020155152555 has 16 divisors (see below), whose sum is σ = 1526258098944. Its totient is φ = 635940874080.

The previous prime is 1020155152553. The next prime is 1020155152567. The reversal of 1020155152555 is 5552515510201.

It is not a de Polignac number, because 1020155152555 - 2¹ = 1020155152553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020155152553) 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, 1324876437 + ... + 1324877206.

It is an arithmetic number, because the mean of its divisors is an integer number (95391131184).

Almost surely, 2^{1020155152555} is an apocalyptic number.

1020155152555 is a deficient number, since it is larger than the sum of its proper divisors (506102946389).

1020155152555 is a wasteful number, since it uses less digits than its factorization.

1020155152555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649753666.

The product of its (nonzero) digits is 62500, while the sum is 37.

The spelling of 1020155152555 in words is "one trillion, twenty billion, one hundred fifty-five million, one hundred fifty-two thousand, five hundred fifty-five".