1561672104 has 32 divisors (see below), whose sum is σ = 3910290720. Its totient is φ = 519742656.

The previous prime is 1561672081. The next prime is 1561672109. The reversal of 1561672104 is 4012761651.

It is not an unprimeable number, because it can be changed into a prime (1561672109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35167 + ... + 66030.

It is an arithmetic number, because the mean of its divisors is an integer number (122196585).

Almost surely, 2^1561672104 is an apocalyptic number.

It is an amenable number.

1561672104 is an abundant number, since it is smaller than the sum of its proper divisors (2348618616).

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

1561672104 is a wasteful number, since it uses less digits than its factorization.

1561672104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101849 (or 101845 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1561672104 is about 39517.9972164582. The cubic root of 1561672104 is about 1160.1922253777.

The spelling of 1561672104 in words is "one billion, five hundred sixty-one million, six hundred seventy-two thousand, one hundred four".