1545642542440 has 32 divisors (see below), whose sum is σ = 3505079162880. Its totient is φ = 613388849472.

The previous prime is 1545642542429. The next prime is 1545642542461. The reversal of 1545642542440 is 442452465451.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152125092 + ... + 152135251.

It is an arithmetic number, because the mean of its divisors is an integer number (109533723840).

Almost surely, 2^{1545642542440} is an apocalyptic number.

1545642542440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1545642542440 is an abundant number, since it is smaller than the sum of its proper divisors (1959436620440).

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

1545642542440 is a wasteful number, since it uses less digits than its factorization.

1545642542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304260481 (or 304260477 counting only the distinct ones).

The product of its (nonzero) digits is 3072000, while the sum is 46.

The spelling of 1545642542440 in words is "one trillion, five hundred forty-five billion, six hundred forty-two million, five hundred forty-two thousand, four hundred forty".