1171971937506 has 16 divisors (see below), whose sum is σ = 2343954573504. Its totient is φ = 390655529424.

The previous prime is 1171971937489. The next prime is 1171971937567. The reversal of 1171971937506 is 6057391791711.

It is a happy 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, 2073715 + ... + 2577641.

It is an arithmetic number, because the mean of its divisors is an integer number (146497160844).

Almost surely, 2^{1171971937506} is an apocalyptic number.

1171971937506 is an abundant number, since it is smaller than the sum of its proper divisors (1171982635998).

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

1171971937506 is a wasteful number, since it uses less digits than its factorization.

1171971937506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891545.

The product of its (nonzero) digits is 2500470, while the sum is 57.

The spelling of 1171971937506 in words is "one trillion, one hundred seventy-one billion, nine hundred seventy-one million, nine hundred thirty-seven thousand, five hundred six".