12501776145 has 32 divisors (see below), whose sum is σ = 20149420032. Its totient is φ = 6618863552.

The previous prime is 12501776143. The next prime is 12501776173. The reversal of 12501776145 is 54167710521.

It is a cyclic number.

It is not a de Polignac number, because 12501776145 - 2¹ = 12501776143 is a prime.

It is a super-2 number, since 2×12501776145² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12501776143) 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, 2158924 + ... + 2164706.

It is an arithmetic number, because the mean of its divisors is an integer number (629669376).

Almost surely, 2^12501776145 is an apocalyptic number.

12501776145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12501776145 is a deficient number, since it is larger than the sum of its proper divisors (7647643887).

12501776145 is a wasteful number, since it uses less digits than its factorization.

12501776145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821.

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 12501776145 in words is "twelve billion, five hundred one million, seven hundred seventy-six thousand, one hundred forty-five".