1561890003252 has 48 divisors (see below), whose sum is σ = 3781667979264. Its totient is φ = 501197580000.

The previous prime is 1561890003239. The next prime is 1561890003257. The reversal of 1561890003252 is 2523000981651.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561890003257) 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, 10920124 + ... + 11062227.

It is an arithmetic number, because the mean of its divisors is an integer number (78784749568).

Almost surely, 2^{1561890003252} is an apocalyptic number.

1561890003252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561890003252 is an abundant number, since it is smaller than the sum of its proper divisors (2219777976012).

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

1561890003252 is a wasteful number, since it uses less digits than its factorization.

1561890003252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21982580 (or 21982578 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 42.

The spelling of 1561890003252 in words is "one trillion, five hundred sixty-one billion, eight hundred ninety million, three thousand, two hundred fifty-two".