1261132883418 has 32 divisors (see below), whose sum is σ = 2540886739776. Its totient is φ = 417274640768.

The previous prime is 1261132883407. The next prime is 1261132883429. The reversal of 1261132883418 is 8143882311621.

It is an interprime number because it is at equal distance from previous prime (1261132883407) and next prime (1261132883429).

It is a super-2 number, since 2×1261132883418² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11059180 + ... + 11172632.

It is an arithmetic number, because the mean of its divisors is an integer number (79402710618).

Almost surely, 2^{1261132883418} is an apocalyptic number.

1261132883418 is an abundant number, since it is smaller than the sum of its proper divisors (1279753856358).

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

1261132883418 is a wasteful number, since it uses less digits than its factorization.

1261132883418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127118.

The product of its digits is 442368, while the sum is 48.

The spelling of 1261132883418 in words is "one trillion, two hundred sixty-one billion, one hundred thirty-two million, eight hundred eighty-three thousand, four hundred eighteen".