1381561654 has 32 divisors (see below), whose sum is σ = 2362970880. Its totient is φ = 599676000.

The previous prime is 1381561639. The next prime is 1381561693. The reversal of 1381561654 is 4561651831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356829 + ... + 360679.

It is an arithmetic number, because the mean of its divisors is an integer number (73842840).

Almost surely, 2^1381561654 is an apocalyptic number.

1381561654 is a deficient number, since it is larger than the sum of its proper divisors (981409226).

1381561654 is a wasteful number, since it uses less digits than its factorization.

1381561654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4596.

The product of its digits is 86400, while the sum is 40.

The square root of 1381561654 is about 37169.3644551531. The cubic root of 1381561654 is about 1113.7560860216.

The spelling of 1381561654 in words is "one billion, three hundred eighty-one million, five hundred sixty-one thousand, six hundred fifty-four".