161802496 has 18 divisors (see below), whose sum is σ = 322973462. Its totient is φ = 80901120.

The previous prime is 161802491. The next prime is 161802497. The reversal of 161802496 is 694208161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 161798400 + 4096 = 12720^2 + 64^2 .

It is not an unprimeable number, because it can be changed into a prime (161802491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315765 + ... + 316276.

Almost surely, 2^161802496 is an apocalyptic number.

161802496 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161802496 is a deficient number, since it is larger than the sum of its proper divisors (161170966).

161802496 is an frugal number, since it uses more digits than its factorization.

161802496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632057 (or 632043 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 161802496 is about 12720.1610052703. The cubic root of 161802496 is about 544.9145515953.

The spelling of 161802496 in words is "one hundred sixty-one million, eight hundred two thousand, four hundred ninety-six".