145761348491949 has 4 divisors (see below), whose sum is σ = 194348464655936. Its totient is φ = 97174232327964.

The previous prime is 145761348491939. The next prime is 145761348491953. The reversal of 145761348491949 is 949194843167541.

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 not a de Polignac number, because 145761348491949 - 2¹⁹ = 145761347967661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145761348491939) 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, 24293558081989 + ... + 24293558081994.

It is an arithmetic number, because the mean of its divisors is an integer number (48587116163984).

Almost surely, 2^{145761348491949} is an apocalyptic number.

It is an amenable number.

145761348491949 is a deficient number, since it is larger than the sum of its proper divisors (48587116163987).

145761348491949 is an equidigital number, since it uses as much as digits as its factorization.

145761348491949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48587116163986.

The product of its digits is 940584960, while the sum is 75.

The spelling of 145761348491949 in words is "one hundred forty-five trillion, seven hundred sixty-one billion, three hundred forty-eight million, four hundred ninety-one thousand, nine hundred forty-nine".