161510749456 has 135 divisors (see below), whose sum is σ = 376952641623. Its totient is φ = 66841346880.

The previous prime is 161510749441. The next prime is 161510749469. The reversal of 161510749456 is 654947015161.

The square root of 161510749456 is 401884.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 348835081 + ... + 348835543.

Almost surely, 2^161510749456 is an apocalyptic number.

161510749456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

161510749456 is the 401884-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161510749456

161510749456 is an abundant number, since it is smaller than the sum of its proper divisors (215441892167).

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

161510749456 is an frugal number, since it uses more digits than its factorization.

161510749456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 49.

Multiplying 161510749456 by its sum of digits (49), we get a square (7914026723344 = 2813188²).

161510749456 divided by its sum of digits (49) gives a square (3296137744 = 57412²).

The spelling of 161510749456 in words is "one hundred sixty-one billion, five hundred ten million, seven hundred forty-nine thousand, four hundred fifty-six".