145247553421745 has 16 divisors (see below), whose sum is σ = 174421305164880. Its totient is φ = 116115217803264.

The previous prime is 145247553421741. The next prime is 145247553421753. The reversal of 145247553421745 is 547124355742541.

It can be written as a sum of positive squares in 8 ways, for example, as 38693774266624 + 106553779155121 = 6220432^2 + 10322489^2 .

It is a cyclic number.

It is not a de Polignac number, because 145247553421745 - 2² = 145247553421741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145247553421741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 711934211 + ... + 712138199.

It is an arithmetic number, because the mean of its divisors is an integer number (10901331572805).

Almost surely, 2^{145247553421745} is an apocalyptic number.

It is an amenable number.

145247553421745 is a deficient number, since it is larger than the sum of its proper divisors (29173751743135).

145247553421745 is a wasteful number, since it uses less digits than its factorization.

145247553421745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304804.

The product of its digits is 94080000, while the sum is 59.

The spelling of 145247553421745 in words is "one hundred forty-five trillion, two hundred forty-seven billion, five hundred fifty-three million, four hundred twenty-one thousand, seven hundred forty-five".