1561664222610 has 64 divisors (see below), whose sum is σ = 3968647840512. Its totient is φ = 391928979456.

The previous prime is 1561664222609. The next prime is 1561664222633. The reversal of 1561664222610 is 162224661651.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13532514 + ... + 13647426.

It is an arithmetic number, because the mean of its divisors is an integer number (62010122508).

Almost surely, 2^{1561664222610} is an apocalyptic number.

1561664222610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561664222610 is an abundant number, since it is smaller than the sum of its proper divisors (2406983617902).

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

1561664222610 is a wasteful number, since it uses less digits than its factorization.

1561664222610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141587.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 1561664222610 in words is "one trillion, five hundred sixty-one billion, six hundred sixty-four million, two hundred twenty-two thousand, six hundred ten".