1261012622709 has 32 divisors (see below), whose sum is σ = 1983645712384. Its totient is φ = 697292893440.

The previous prime is 1261012622693. The next prime is 1261012622743. The reversal of 1261012622709 is 9072262101621.

It is not a de Polignac number, because 1261012622709 - 2⁴ = 1261012622693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261012622789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13359012 + ... + 13453074.

It is an arithmetic number, because the mean of its divisors is an integer number (61988928512).

Almost surely, 2^{1261012622709} is an apocalyptic number.

It is an amenable number.

1261012622709 is a deficient number, since it is larger than the sum of its proper divisors (722633089675).

1261012622709 is a wasteful number, since it uses less digits than its factorization.

1261012622709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114697.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 1261012622709 in words is "one trillion, two hundred sixty-one billion, twelve million, six hundred twenty-two thousand, seven hundred nine".