161887147430 has 32 divisors (see below), whose sum is σ = 293645883744. Its totient is φ = 64256772096.

The previous prime is 161887147423. The next prime is 161887147453. The reversal of 161887147430 is 34741788161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660569 + ... + 871851.

It is an arithmetic number, because the mean of its divisors is an integer number (9176433867).

Almost surely, 2^161887147430 is an apocalyptic number.

161887147430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161887147430 is a deficient number, since it is larger than the sum of its proper divisors (131758736314).

161887147430 is a wasteful number, since it uses less digits than its factorization.

161887147430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211880.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 161887147430 in words is "one hundred sixty-one billion, eight hundred eighty-seven million, one hundred forty-seven thousand, four hundred thirty".