1561370676 has 48 divisors (see below), whose sum is σ = 3958671360. Its totient is φ = 477156960.

The previous prime is 1561370641. The next prime is 1561370687. The reversal of 1561370676 is 6760731651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103386 + ... + 117521.

It is an arithmetic number, because the mean of its divisors is an integer number (82472320).

Almost surely, 2^1561370676 is an apocalyptic number.

It is an amenable number.

1561370676 is an abundant number, since it is smaller than the sum of its proper divisors (2397300684).

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

1561370676 is a wasteful number, since it uses less digits than its factorization.

1561370676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220964 (or 220962 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 1561370676 is about 39514.1832257735. The cubic root of 1561370676 is about 1160.1175752802.

The spelling of 1561370676 in words is "one billion, five hundred sixty-one million, three hundred seventy thousand, six hundred seventy-six".