1020155025204 has 144 divisors (see below), whose sum is σ = 3086529054336. Its totient is φ = 288586800000.

The previous prime is 1020155025187. The next prime is 1020155025233. The reversal of 1020155025204 is 4025205510201.

1020155025204 is a `hidden beast` number, since 102 + 0 + 1 + 5 + 502 + 52 + 0 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55047 + ... + 1429454.

It is an arithmetic number, because the mean of its divisors is an integer number (21434229544).

Almost surely, 2^{1020155025204} is an apocalyptic number.

1020155025204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020155025204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543264527168).

1020155025204 is an abundant number, since it is smaller than the sum of its proper divisors (2066374029132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020155025204 is a wasteful number, since it uses less digits than its factorization.

1020155025204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484628 (or 1484614 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 1020155025204 in words is "one trillion, twenty billion, one hundred fifty-five million, twenty-five thousand, two hundred four".