12406156771440 has 160 divisors (see below), whose sum is σ = 39787226311680. Its totient is φ = 3194071114752.

The previous prime is 12406156771433. The next prime is 12406156771441. The reversal of 12406156771440 is 4417765160421.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12406156771440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12406156771441) 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, 219678087 + ... + 219734553.

It is an arithmetic number, because the mean of its divisors is an integer number (248670164448).

Almost surely, 2^{12406156771440} is an apocalyptic number.

12406156771440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12406156771440 is an abundant number, since it is smaller than the sum of its proper divisors (27381069540240).

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

12406156771440 is a wasteful number, since it uses less digits than its factorization.

12406156771440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88079 (or 88073 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 12406156771440 in words is "twelve trillion, four hundred six billion, one hundred fifty-six million, seven hundred seventy-one thousand, four hundred forty".