145616377 has 4 divisors (see below), whose sum is σ = 146371060. Its totient is φ = 144861696.

The previous prime is 145616357. The next prime is 145616389. The reversal of 145616377 is 773616541.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21427641 + 124188736 = 4629^2 + 11144^2 .

It is a cyclic number.

It is not a de Polignac number, because 145616377 - 2¹⁵ = 145583609 is a prime.

It is a super-2 number, since 2×145616377² = 42408258501212258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145616347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377052 + ... + 377437.

It is an arithmetic number, because the mean of its divisors is an integer number (36592765).

Almost surely, 2^145616377 is an apocalyptic number.

It is an amenable number.

145616377 is a deficient number, since it is larger than the sum of its proper divisors (754683).

145616377 is an equidigital number, since it uses as much as digits as its factorization.

145616377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754682.

The product of its digits is 105840, while the sum is 40.

The square root of 145616377 is about 12067.1610994467. The cubic root of 145616377 is about 526.1021465953.

The spelling of 145616377 in words is "one hundred forty-five million, six hundred sixteen thousand, three hundred seventy-seven".