145415342778 has 16 divisors (see below), whose sum is σ = 290836842240. Its totient is φ = 48470754816.

The previous prime is 145415342777. The next prime is 145415342783. The reversal of 145415342778 is 877243514541.

It is a super-2 number, since 2×145415342778² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145415342778.

It is not an unprimeable number, because it can be changed into a prime (145415342777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85626 + ... + 546042.

It is an arithmetic number, because the mean of its divisors is an integer number (18177302640).

Almost surely, 2^145415342778 is an apocalyptic number.

145415342778 is an abundant number, since it is smaller than the sum of its proper divisors (145421499462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145415342778 is a wasteful number, since it uses less digits than its factorization.

145415342778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513061.

The product of its digits is 3763200, while the sum is 51.

The spelling of 145415342778 in words is "one hundred forty-five billion, four hundred fifteen million, three hundred forty-two thousand, seven hundred seventy-eight".