1561562488 has 8 divisors (see below), whose sum is σ = 2927929680. Its totient is φ = 780781240.

The previous prime is 1561562447. The next prime is 1561562533. The reversal of 1561562488 is 8842651651.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97597648 + ... + 97597663.

It is an arithmetic number, because the mean of its divisors is an integer number (365991210).

Almost surely, 2^1561562488 is an apocalyptic number.

It is an amenable number.

1561562488 is a deficient number, since it is larger than the sum of its proper divisors (1366367192).

1561562488 is a wasteful number, since it uses less digits than its factorization.

1561562488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195195317 (or 195195313 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The square root of 1561562488 is about 39516.6102797292. The cubic root of 1561562488 is about 1160.1650795583.

The spelling of 1561562488 in words is "one billion, five hundred sixty-one million, five hundred sixty-two thousand, four hundred eighty-eight".