1261137484874 has 32 divisors (see below), whose sum is σ = 1945499554944. Its totient is φ = 612792714240.

The previous prime is 1261137484807. The next prime is 1261137484879. The reversal of 1261137484874 is 4784847311621.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1261137484879) 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 15 ways as a sum of consecutive naturals, for example, 16224947 + ... + 16302489.

It is an arithmetic number, because the mean of its divisors is an integer number (60796861092).

Almost surely, 2^{1261137484874} is an apocalyptic number.

1261137484874 is a deficient number, since it is larger than the sum of its proper divisors (684362070070).

1261137484874 is a wasteful number, since it uses less digits than its factorization.

1261137484874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78542.

The product of its digits is 7225344, while the sum is 56.

The spelling of 1261137484874 in words is "one trillion, two hundred sixty-one billion, one hundred thirty-seven million, four hundred eighty-four thousand, eight hundred seventy-four".