156166111206500 has 24 divisors (see below), whose sum is σ = 341066786876088. Its totient is φ = 62466444482400.

The previous prime is 156166111206419. The next prime is 156166111206569. The reversal of 156166111206500 is 5602111661651.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 50256161148964 + 105909950057536 = 7089158^2 + 10291256^2 .

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, 156166110707 + ... + 156166111706.

It is an arithmetic number, because the mean of its divisors is an integer number (14211116119837).

Almost surely, 2^{156166111206500} is an apocalyptic number.

156166111206500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156166111206500 is an abundant number, since it is smaller than the sum of its proper divisors (184900675669588).

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

156166111206500 is a wasteful number, since it uses less digits than its factorization.

156166111206500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312332222432 (or 312332222420 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 156166111206500 in words is "one hundred fifty-six trillion, one hundred sixty-six billion, one hundred eleven million, two hundred six thousand, five hundred".