1561693048 has 16 divisors (see below), whose sum is σ = 2936868480. Its totient is φ = 778528128.

The previous prime is 1561693043. The next prime is 1561693069. The reversal of 1561693048 is 8403961651.

It is a junction number, because it is equal to n+sod(n) for n = 1561692995 and 1561693013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561693043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286936 + ... + 292327.

It is an arithmetic number, because the mean of its divisors is an integer number (183554280).

Almost surely, 2^1561693048 is an apocalyptic number.

It is an amenable number.

1561693048 is a deficient number, since it is larger than the sum of its proper divisors (1375175432).

1561693048 is a wasteful number, since it uses less digits than its factorization.

1561693048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579606 (or 579602 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1561693048 is about 39518.2622087561. The cubic root of 1561693048 is about 1160.1974119034.

The spelling of 1561693048 in words is "one billion, five hundred sixty-one million, six hundred ninety-three thousand, forty-eight".