161507552651 has 8 divisors (see below), whose sum is σ = 163248414720. Its totient is φ = 159774021288.

The previous prime is 161507552599. The next prime is 161507552663. The reversal of 161507552651 is 156255705161.

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

It is a cyclic number.

It is not a de Polignac number, because 161507552651 - 2¹⁰ = 161507551627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161507552681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1788371 + ... + 1876508.

It is an arithmetic number, because the mean of its divisors is an integer number (20406051840).

Almost surely, 2^161507552651 is an apocalyptic number.

161507552651 is a deficient number, since it is larger than the sum of its proper divisors (1740862069).

161507552651 is a wasteful number, since it uses less digits than its factorization.

161507552651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665353.

The product of its (nonzero) digits is 315000, while the sum is 44.

The spelling of 161507552651 in words is "one hundred sixty-one billion, five hundred seven million, five hundred fifty-two thousand, six hundred fifty-one".