161451171453 has 32 divisors (see below), whose sum is σ = 253341228672. Its totient is φ = 90165657600.

The previous prime is 161451171443. The next prime is 161451171487. The reversal of 161451171453 is 354171154161.

It is not a de Polignac number, because 161451171453 - 2⁶ = 161451171389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161451171443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78588 + ... + 573653.

It is an arithmetic number, because the mean of its divisors is an integer number (7916913396).

Almost surely, 2^161451171453 is an apocalyptic number.

161451171453 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161451171453 is a deficient number, since it is larger than the sum of its proper divisors (91890057219).

161451171453 is a wasteful number, since it uses less digits than its factorization.

161451171453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652845.

The product of its digits is 50400, while the sum is 39.

The spelling of 161451171453 in words is "one hundred sixty-one billion, four hundred fifty-one million, one hundred seventy-one thousand, four hundred fifty-three".