12961795154 has 24 divisors (see below), whose sum is σ = 24423881664. Its totient is φ = 5050049400.

The previous prime is 12961795141. The next prime is 12961795159. The reversal of 12961795154 is 45159716921.

It is a happy number.

It is a super-2 number, since 2×12961795154² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12961795159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3824102 + ... + 3827489.

It is an arithmetic number, because the mean of its divisors is an integer number (1017661736).

Almost surely, 2^12961795154 is an apocalyptic number.

12961795154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12961795154 is a deficient number, since it is larger than the sum of its proper divisors (11462086510).

12961795154 is a wasteful number, since it uses less digits than its factorization.

12961795154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7651622 (or 7651611 counting only the distinct ones).

The product of its digits is 680400, while the sum is 50.

The spelling of 12961795154 in words is "twelve billion, nine hundred sixty-one million, seven hundred ninety-five thousand, one hundred fifty-four".