161772744370 has 8 divisors (see below), whose sum is σ = 291190939884. Its totient is φ = 64709097744.

The previous prime is 161772744361. The next prime is 161772744403. The reversal of 161772744370 is 73447277161.

It can be written as a sum of positive squares in 2 ways, for example, as 161755991721 + 16752649 = 402189^2 + 4093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8088637209 + ... + 8088637228.

Almost surely, 2^161772744370 is an apocalyptic number.

161772744370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161772744370 is a deficient number, since it is larger than the sum of its proper divisors (129418195514).

161772744370 is a wasteful number, since it uses less digits than its factorization.

161772744370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16177274444.

The product of its (nonzero) digits is 1382976, while the sum is 49.

The spelling of 161772744370 in words is "one hundred sixty-one billion, seven hundred seventy-two million, seven hundred forty-four thousand, three hundred seventy".