1261314618810 has 16 divisors (see below), whose sum is σ = 3027155085216. Its totient is φ = 336350565008.

The previous prime is 1261314618799. The next prime is 1261314618827. The reversal of 1261314618810 is 188164131621.

It is a super-2 number, since 2×1261314618810² (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 7 ways as a sum of consecutive naturals, for example, 21021910284 + ... + 21021910343.

It is an arithmetic number, because the mean of its divisors is an integer number (189197192826).

Almost surely, 2^{1261314618810} is an apocalyptic number.

1261314618810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1261314618810 is an abundant number, since it is smaller than the sum of its proper divisors (1765840466406).

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

1261314618810 is a wasteful number, since it uses less digits than its factorization.

1261314618810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42043820637.

The product of its (nonzero) digits is 55296, while the sum is 42.

The spelling of 1261314618810 in words is "one trillion, two hundred sixty-one billion, three hundred fourteen million, six hundred eighteen thousand, eight hundred ten".