145504161641461 has 4 divisors (see below), whose sum is σ = 166290470447392. Its totient is φ = 124717852835532.

The previous prime is 145504161641459. The next prime is 145504161641471. The reversal of 145504161641461 is 164146161405541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 145504161641461 - 2¹ = 145504161641459 is a prime.

It is a super-2 number, since 2×145504161641461² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145504161641441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10393154402955 + ... + 10393154402968.

It is an arithmetic number, because the mean of its divisors is an integer number (41572617611848).

Almost surely, 2^{145504161641461} is an apocalyptic number.

It is an amenable number.

145504161641461 is a deficient number, since it is larger than the sum of its proper divisors (20786308805931).

145504161641461 is an equidigital number, since it uses as much as digits as its factorization.

145504161641461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20786308805930.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The spelling of 145504161641461 in words is "one hundred forty-five trillion, five hundred four billion, one hundred sixty-one million, six hundred forty-one thousand, four hundred sixty-one".