1261081357076 has 24 divisors (see below), whose sum is σ = 2330372866080. Its totient is φ = 595469917152.

The previous prime is 1261081357061. The next prime is 1261081357099. The reversal of 1261081357076 is 6707531801621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261081357076.

It is a congruent number.

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, 26148110 + ... + 26196293.

It is an arithmetic number, because the mean of its divisors is an integer number (97098869420).

Almost surely, 2^{1261081357076} is an apocalyptic number.

It is an amenable number.

1261081357076 is a deficient number, since it is larger than the sum of its proper divisors (1069291509004).

1261081357076 is a wasteful number, since it uses less digits than its factorization.

1261081357076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52344743 (or 52344741 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 47.

The spelling of 1261081357076 in words is "one trillion, two hundred sixty-one billion, eighty-one million, three hundred fifty-seven thousand, seventy-six".