12171777038 has 16 divisors (see below), whose sum is σ = 18561225600. Its totient is φ = 5985006456.

The previous prime is 12171776987. The next prime is 12171777043. The reversal of 12171777038 is 83077717121.

It is a self number, because there is not a number n which added to its sum of digits gives 12171777038.

It is a congruent number.

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, 4445 + ... + 156087.

It is an arithmetic number, because the mean of its divisors is an integer number (1160076600).

Almost surely, 2^12171777038 is an apocalyptic number.

12171777038 is a deficient number, since it is larger than the sum of its proper divisors (6389448562).

12171777038 is a wasteful number, since it uses less digits than its factorization.

12171777038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152311.

The product of its (nonzero) digits is 115248, while the sum is 44.

The spelling of 12171777038 in words is "twelve billion, one hundred seventy-one million, seven hundred seventy-seven thousand, thirty-eight".