145040121640 has 32 divisors (see below), whose sum is σ = 327454089480. Its totient is φ = 57818036992.

The previous prime is 145040121623. The next prime is 145040121641. The reversal of 145040121640 is 46121040541.

It can be written as a sum of positive squares in 4 ways, for example, as 144091604836 + 948516804 = 379594^2 + 30798^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145040121599 and 145040121608.

It is not an unprimeable number, because it can be changed into a prime (145040121641) 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, 6175999 + ... + 6199438.

Almost surely, 2^145040121640 is an apocalyptic number.

145040121640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145040121640 is an abundant number, since it is smaller than the sum of its proper divisors (182413967840).

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

145040121640 is a wasteful number, since it uses less digits than its factorization.

145040121640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12375741 (or 12375737 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 145040121640 in words is "one hundred forty-five billion, forty million, one hundred twenty-one thousand, six hundred forty".