1561401622 has 16 divisors (see below), whose sum is σ = 2580321744. Its totient is φ = 702700000.

The previous prime is 1561401619. The next prime is 1561401649. The reversal of 1561401622 is 2261041651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349129 + ... + 353572.

It is an arithmetic number, because the mean of its divisors is an integer number (161270109).

Almost surely, 2^1561401622 is an apocalyptic number.

1561401622 is a deficient number, since it is larger than the sum of its proper divisors (1018920122).

1561401622 is a wasteful number, since it uses less digits than its factorization.

1561401622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702815.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1561401622 is about 39514.5748047477. The cubic root of 1561401622 is about 1160.1252396488.

The spelling of 1561401622 in words is "one billion, five hundred sixty-one million, four hundred one thousand, six hundred twenty-two".