145736077421 has 4 divisors (see below), whose sum is σ = 158984811744. Its totient is φ = 132487343100.

The previous prime is 145736077387. The next prime is 145736077433. The reversal of 145736077421 is 124770637541.

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 145736077421 - 2²² = 145731883117 is a prime.

It is a super-2 number, since 2×145736077421² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145736077441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6624367145 + ... + 6624367166.

It is an arithmetic number, because the mean of its divisors is an integer number (39746202936).

Almost surely, 2^145736077421 is an apocalyptic number.

145736077421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145736077421 is a deficient number, since it is larger than the sum of its proper divisors (13248734323).

145736077421 is a wasteful number, since it uses less digits than its factorization.

145736077421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13248734322.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 145736077421 in words is "one hundred forty-five billion, seven hundred thirty-six million, seventy-seven thousand, four hundred twenty-one".