161477372645 has 8 divisors (see below), whose sum is σ = 193780469760. Its totient is φ = 129176816400.

The previous prime is 161477372611. The next prime is 161477372669. The reversal of 161477372645 is 546273774161.

It is a happy number.

161477372645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161477372645 - 2²⁰ = 161476324069 is a prime.

It is a super-4 number, since 4×161477372645⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492485 + ... + 751994.

It is an arithmetic number, because the mean of its divisors is an integer number (24222558720).

Almost surely, 2^161477372645 is an apocalyptic number.

It is an amenable number.

161477372645 is a deficient number, since it is larger than the sum of its proper divisors (32303097115).

161477372645 is a wasteful number, since it uses less digits than its factorization.

161477372645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270435.

The product of its digits is 5927040, while the sum is 53.

The spelling of 161477372645 in words is "one hundred sixty-one billion, four hundred seventy-seven million, three hundred seventy-two thousand, six hundred forty-five".