145915771878 has 24 divisors (see below), whose sum is σ = 316250350416. Its totient is φ = 48623281200.

The previous prime is 145915771871. The next prime is 145915771909. The reversal of 145915771878 is 878177519541.

145915771878 is a `hidden beast` number, since 1 + 4 + 59 + 1 + 577 + 1 + 8 + 7 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145915771871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1216938 + ... + 1331453.

It is an arithmetic number, because the mean of its divisors is an integer number (13177097934).

Almost surely, 2^145915771878 is an apocalyptic number.

145915771878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

145915771878 is an abundant number, since it is smaller than the sum of its proper divisors (170334578538).

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

145915771878 is a wasteful number, since it uses less digits than its factorization.

145915771878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551580 (or 2551577 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 63.

The spelling of 145915771878 in words is "one hundred forty-five billion, nine hundred fifteen million, seven hundred seventy-one thousand, eight hundred seventy-eight".