161351748 has 36 divisors (see below), whose sum is σ = 408565248. Its totient is φ = 53691120.

The previous prime is 161351747. The next prime is 161351761. The reversal of 161351748 is 847153161.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (161351747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19165 + ... + 26267.

Almost surely, 2^161351748 is an apocalyptic number.

161351748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161351748 is an abundant number, since it is smaller than the sum of its proper divisors (247213500).

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

161351748 is a wasteful number, since it uses less digits than its factorization.

161351748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7744 (or 7739 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 161351748 is about 12702.4307909943. The cubic root of 161351748 is about 544.4080749025.

It can be divided in two parts, 1613 and 51748, that added together give a square (53361 = 231²).

The spelling of 161351748 in words is "one hundred sixty-one million, three hundred fifty-one thousand, seven hundred forty-eight".