1691052556 has 12 divisors (see below), whose sum is σ = 3015178992. Its totient is φ = 829572848.

The previous prime is 1691052523. The next prime is 1691052581. The reversal of 1691052556 is 6552501961.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3988120 + ... + 3988543.

It is an arithmetic number, because the mean of its divisors is an integer number (251264916).

Almost surely, 2^1691052556 is an apocalyptic number.

It is an amenable number.

1691052556 is a deficient number, since it is larger than the sum of its proper divisors (1324126436).

1691052556 is a wasteful number, since it uses less digits than its factorization.

1691052556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7976720 (or 7976718 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 1691052556 is about 41122.4094138464. The cubic root of 1691052556 is about 1191.3856598520.

The spelling of 1691052556 in words is "one billion, six hundred ninety-one million, fifty-two thousand, five hundred fifty-six".