1561501434 has 64 divisors (see below), whose sum is σ = 3451392000. Its totient is φ = 469048320.

The previous prime is 1561501421. The next prime is 1561501451. The reversal of 1561501434 is 4341051651.

It is a happy number.

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, 204762 + ... + 212250.

It is an arithmetic number, because the mean of its divisors is an integer number (53928000).

Almost surely, 2^1561501434 is an apocalyptic number.

1561501434 is an abundant number, since it is smaller than the sum of its proper divisors (1889890566).

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

1561501434 is a wasteful number, since it uses less digits than its factorization.

1561501434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1561501434 is about 39515.8377615862. The cubic root of 1561501434 is about 1160.1499593091.

The spelling of 1561501434 in words is "one billion, five hundred sixty-one million, five hundred one thousand, four hundred thirty-four".