161630770 has 16 divisors (see below), whose sum is σ = 332497728. Its totient is φ = 55416240.

The previous prime is 161630753. The next prime is 161630771. The reversal of 161630770 is 77036161.

It is a super-2 number, since 2×161630770² = 52249011621585800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161630771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1154436 + ... + 1154575.

It is an arithmetic number, because the mean of its divisors is an integer number (20781108).

Almost surely, 2^161630770 is an apocalyptic number.

161630770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161630770 is an abundant number, since it is smaller than the sum of its proper divisors (170866958).

161630770 is a wasteful number, since it uses less digits than its factorization.

161630770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2309025.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 161630770 is about 12713.4090628753. The cubic root of 161630770 is about 544.7217051247.

The spelling of 161630770 in words is "one hundred sixty-one million, six hundred thirty thousand, seven hundred seventy".