1261117420662 has 96 divisors (see below), whose sum is σ = 2997912508416. Its totient is φ = 352024119040.

The previous prime is 1261117420657. The next prime is 1261117420663. The reversal of 1261117420662 is 2660247111621.

It is a self number, because there is not a number n which added to its sum of digits gives 1261117420662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261117420663) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 506958 + ... + 1667105.

It is an arithmetic number, because the mean of its divisors is an integer number (31228255296).

Almost surely, 2^{1261117420662} is an apocalyptic number.

1261117420662 is an abundant number, since it is smaller than the sum of its proper divisors (1736795087754).

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

1261117420662 is a wasteful number, since it uses less digits than its factorization.

1261117420662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174154 (or 2174143 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 1261117420662 in words is "one trillion, two hundred sixty-one billion, one hundred seventeen million, four hundred twenty thousand, six hundred sixty-two".