145405562446 has 4 divisors (see below), whose sum is σ = 218108343672. Its totient is φ = 72702781222.

The previous prime is 145405562431. The next prime is 145405562459. The reversal of 145405562446 is 644265504541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644265504541 = 31 ⋅20782758211.

It is a super-2 number, since 2×145405562446² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145405562396 and 145405562405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36351390610 + ... + 36351390613.

It is an arithmetic number, because the mean of its divisors is an integer number (54527085918).

Almost surely, 2^145405562446 is an apocalyptic number.

145405562446 is a deficient number, since it is larger than the sum of its proper divisors (72702781226).

145405562446 is an equidigital number, since it uses as much as digits as its factorization.

145405562446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72702781225.

The product of its (nonzero) digits is 2304000, while the sum is 46.

The spelling of 145405562446 in words is "one hundred forty-five billion, four hundred five million, five hundred sixty-two thousand, four hundred forty-six".