1261057162969 has 16 divisors (see below), whose sum is σ = 1317634030080. Its totient is φ = 1204626709440.

The previous prime is 1261057162957. The next prime is 1261057162993. The reversal of 1261057162969 is 9692617501621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261057162969 is a prime.

It is a super-3 number, since 3×1261057162969³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261057162919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140004064 + ... + 140013070.

It is an arithmetic number, because the mean of its divisors is an integer number (82352126880).

Almost surely, 2^{1261057162969} is an apocalyptic number.

It is an amenable number.

1261057162969 is a deficient number, since it is larger than the sum of its proper divisors (56576867111).

1261057162969 is an equidigital number, since it uses as much as digits as its factorization.

1261057162969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16440.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 1261057162969 in words is "one trillion, two hundred sixty-one billion, fifty-seven million, one hundred sixty-two thousand, nine hundred sixty-nine".