161630647560 has 128 divisors (see below), whose sum is σ = 553330281600. Its totient is φ = 41936590080.

The previous prime is 161630647483. The next prime is 161630647571. The reversal of 161630647560 is 65746036161.

161630647560 is a `hidden beast` number, since 1 + 6 + 1 + 630 + 6 + 4 + 7 + 5 + 6 + 0 = 666.

161630647560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161630647560² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1982446 + ... + 2062365.

It is an arithmetic number, because the mean of its divisors is an integer number (4322892825).

Almost surely, 2^161630647560 is an apocalyptic number.

161630647560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161630647560 is an abundant number, since it is smaller than the sum of its proper divisors (391699634040).

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

161630647560 is a wasteful number, since it uses less digits than its factorization.

161630647560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044868 (or 4044858 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 161630647560 in words is "one hundred sixty-one billion, six hundred thirty million, six hundred forty-seven thousand, five hundred sixty".