1561502003055 has 64 divisors (see below), whose sum is σ = 2553531402240. Its totient is φ = 814572416000.

The previous prime is 1561502003041. The next prime is 1561502003059. The reversal of 1561502003055 is 5503002051651.

It is not a de Polignac number, because 1561502003055 - 2²⁰ = 1561500954479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561502003059) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 484786345 + ... + 484789565.

It is an arithmetic number, because the mean of its divisors is an integer number (39898928160).

Almost surely, 2^{1561502003055} is an apocalyptic number.

1561502003055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1561502003055 is a deficient number, since it is larger than the sum of its proper divisors (992029399185).

1561502003055 is a wasteful number, since it uses less digits than its factorization.

1561502003055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5872.

The product of its (nonzero) digits is 22500, while the sum is 33.

The spelling of 1561502003055 in words is "one trillion, five hundred sixty-one billion, five hundred two million, three thousand, fifty-five".