1002155020450 has 24 divisors (see below), whose sum is σ = 1864038947220. Its totient is φ = 400855425600.

The previous prime is 1002155020429. The next prime is 1002155020481. The reversal of 1002155020450 is 540205512001.

It can be written as a sum of positive squares in 6 ways, for example, as 76120258201 + 926034762249 = 275899^2 + 962307^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 3909220 + ... + 4157680.

Almost surely, 2^{1002155020450} is an apocalyptic number.

1002155020450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1002155020450 is a deficient number, since it is larger than the sum of its proper divisors (861883926770).

1002155020450 is a wasteful number, since it uses less digits than its factorization.

1002155020450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329142 (or 329137 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 1002155020450 in words is "one trillion, two billion, one hundred fifty-five million, twenty thousand, four hundred fifty".