145515522554 has 4 divisors (see below), whose sum is σ = 218273283834. Its totient is φ = 72757761276.

The previous prime is 145515522539. The next prime is 145515522583. The reversal of 145515522554 is 455225515541.

It is a happy number.

145515522554 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 75117105625 + 70398416929 = 274075^2 + 265327^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36378880637 + ... + 36378880640.

Almost surely, 2^145515522554 is an apocalyptic number.

145515522554 is a deficient number, since it is larger than the sum of its proper divisors (72757761280).

145515522554 is an equidigital number, since it uses as much as digits as its factorization.

145515522554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72757761279.

The product of its digits is 1000000, while the sum is 44.

The spelling of 145515522554 in words is "one hundred forty-five billion, five hundred fifteen million, five hundred twenty-two thousand, five hundred fifty-four".