1998156627 has 32 divisors (see below), whose sum is σ = 2995315200. Its totient is φ = 1316382624.

The previous prime is 1998156613. The next prime is 1998156647. The reversal of 1998156627 is 7266518991.

1998156627 is a `hidden beast` number, since 1 + 9 + 9 + 8 + 1 + 5 + 6 + 627 = 666.

It is not a de Polignac number, because 1998156627 - 2¹¹ = 1998154579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1998156647) 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, 1868649 + ... + 1869717.

It is an arithmetic number, because the mean of its divisors is an integer number (93603600).

Almost surely, 2^1998156627 is an apocalyptic number.

1998156627 is a deficient number, since it is larger than the sum of its proper divisors (997158573).

1998156627 is a wasteful number, since it uses less digits than its factorization.

1998156627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832 (or 1826 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 1998156627 is about 44700.7452622437. The cubic root of 1998156627 is about 1259.5338468363.

The spelling of 1998156627 in words is "one billion, nine hundred ninety-eight million, one hundred fifty-six thousand, six hundred twenty-seven".