145761991441 has 4 divisors (see below), whose sum is σ = 159013081584. Its totient is φ = 132510901300.

The previous prime is 145761991433. The next prime is 145761991483. The reversal of 145761991441 is 144199167541.

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 145761991441 - 2³ = 145761991433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145761991541) 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, 6625545055 + ... + 6625545076.

It is an arithmetic number, because the mean of its divisors is an integer number (39753270396).

Almost surely, 2^145761991441 is an apocalyptic number.

145761991441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145761991441 is a deficient number, since it is larger than the sum of its proper divisors (13251090143).

145761991441 is a wasteful number, since it uses less digits than its factorization.

145761991441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13251090142.

The product of its digits is 1088640, while the sum is 52.

The spelling of 145761991441 in words is "one hundred forty-five billion, seven hundred sixty-one million, nine hundred ninety-one thousand, four hundred forty-one".