1561144674902 has 48 divisors (see below), whose sum is σ = 2490813110016. Its totient is φ = 733400715600.

The previous prime is 1561144674899. The next prime is 1561144674911. The reversal of 1561144674902 is 2094764411651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13745327 + ... + 13858437.

It is an arithmetic number, because the mean of its divisors is an integer number (51891939792).

Almost surely, 2^{1561144674902} is an apocalyptic number.

1561144674902 is a deficient number, since it is larger than the sum of its proper divisors (929668435114).

1561144674902 is a wasteful number, since it uses less digits than its factorization.

1561144674902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113385 (or 113354 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 1561144674902 in words is "one trillion, five hundred sixty-one billion, one hundred forty-four million, six hundred seventy-four thousand, nine hundred two".