161555463247 has 8 divisors (see below), whose sum is σ = 167196369600. Its totient is φ = 155919225504.

The previous prime is 161555463221. The next prime is 161555463259. The reversal of 161555463247 is 742364555161.

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 161555463247 - 2¹⁵ = 161555430479 is a prime.

It is a super-2 number, since 2×161555463247² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161555463247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161555463647) 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, 1096663 + ... + 1235224.

It is an arithmetic number, because the mean of its divisors is an integer number (20899546200).

Almost surely, 2^161555463247 is an apocalyptic number.

161555463247 is a deficient number, since it is larger than the sum of its proper divisors (5640906353).

161555463247 is a wasteful number, since it uses less digits than its factorization.

161555463247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334305.

The product of its digits is 3024000, while the sum is 49.

The spelling of 161555463247 in words is "one hundred sixty-one billion, five hundred fifty-five million, four hundred sixty-three thousand, two hundred forty-seven".