1261559361752 has 16 divisors (see below), whose sum is σ = 2389809617160. Its totient is φ = 624276797184.

The previous prime is 1261559361749. The next prime is 1261559361761. The reversal of 1261559361752 is 2571639551621.

It is a super-2 number, since 2×1261559361752² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1261559361694 and 1261559361703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812859638 + ... + 812861189.

Almost surely, 2^{1261559361752} is an apocalyptic number.

It is an amenable number.

1261559361752 is a deficient number, since it is larger than the sum of its proper divisors (1128250255408).

1261559361752 is a wasteful number, since it uses less digits than its factorization.

1261559361752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625720930 (or 1625720926 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 53.

The spelling of 1261559361752 in words is "one trillion, two hundred sixty-one billion, five hundred fifty-nine million, three hundred sixty-one thousand, seven hundred fifty-two".