1232156967890 has 16 divisors (see below), whose sum is σ = 2227401355608. Its totient is φ = 490747495296.

The previous prime is 1232156967869. The next prime is 1232156967929. The reversal of 1232156967890 is 987696512321.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 841235661721 + 390921306169 = 917189^2 + 625237^2 .

It is a Curzon 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, 264409037 + ... + 264413696.

Almost surely, 2^{1232156967890} is an apocalyptic number.

1232156967890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1232156967890 is a deficient number, since it is larger than the sum of its proper divisors (995244387718).

1232156967890 is a wasteful number, since it uses less digits than its factorization.

1232156967890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528822973.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 1232156967890 in words is "one trillion, two hundred thirty-two billion, one hundred fifty-six million, nine hundred sixty-seven thousand, eight hundred ninety".