1161261646536 has 32 divisors (see below), whose sum is σ = 2903372560800. Its totient is φ = 387058089600.

The previous prime is 1161261646487. The next prime is 1161261646579. The reversal of 1161261646536 is 6356461621611.

It is a super-2 number, since 2×1161261646536² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1493565 + ... + 2133836.

It is an arithmetic number, because the mean of its divisors is an integer number (90730392525).

Almost surely, 2^{1161261646536} is an apocalyptic number.

It is an amenable number.

1161261646536 is an abundant number, since it is smaller than the sum of its proper divisors (1742110914264).

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

1161261646536 is a wasteful number, since it uses less digits than its factorization.

1161261646536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640749 (or 3640745 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The spelling of 1161261646536 in words is "one trillion, one hundred sixty-one billion, two hundred sixty-one million, six hundred forty-six thousand, five hundred thirty-six".