145311776477 has 16 divisors (see below), whose sum is σ = 175792467840. Its totient is φ = 117461316672.

The previous prime is 145311776459. The next prime is 145311776479. The reversal of 145311776477 is 774677113541.

It is a happy number.

It is not a de Polignac number, because 145311776477 - 2⁶ = 145311776413 is a prime.

It is a super-2 number, since 2×145311776477² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145311776479) 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, 8314778 + ... + 8332235.

It is an arithmetic number, because the mean of its divisors is an integer number (10987029240).

Almost surely, 2^145311776477 is an apocalyptic number.

It is an amenable number.

145311776477 is a deficient number, since it is larger than the sum of its proper divisors (30480691363).

145311776477 is a wasteful number, since it uses less digits than its factorization.

145311776477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16647092.

The product of its digits is 3457440, while the sum is 53.

The spelling of 145311776477 in words is "one hundred forty-five billion, three hundred eleven million, seven hundred seventy-six thousand, four hundred seventy-seven".