1561760434 has 24 divisors (see below), whose sum is σ = 2584597572. Its totient is φ = 707204160.

The previous prime is 1561760429. The next prime is 1561760443. The reversal of 1561760434 is 4340671651.

It can be written as a sum of positive squares in 6 ways, for example, as 697224025 + 864536409 = 26405^2 + 29403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1561760393 and 1561760402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25677 + ... + 61504.

Almost surely, 2^1561760434 is an apocalyptic number.

1561760434 is a deficient number, since it is larger than the sum of its proper divisors (1022837138).

1561760434 is a wasteful number, since it uses less digits than its factorization.

1561760434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87262 (or 87249 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1561760434 is about 39519.1147927177. The cubic root of 1561760434 is about 1160.2140989082.

It can be divided in two parts, 1561 and 760434, that added together give a triangular number (761995 = T₁₂₃₄).

The spelling of 1561760434 in words is "one billion, five hundred sixty-one million, seven hundred sixty thousand, four hundred thirty-four".