1540077785540 has 24 divisors (see below), whose sum is σ = 3696186685632. Its totient is φ = 528026669280.

The previous prime is 1540077785539. The next prime is 1540077785551. The reversal of 1540077785540 is 455877700451.

It is a happy number.

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, 5500277666 + ... + 5500277945.

It is an arithmetic number, because the mean of its divisors is an integer number (154007778568).

Almost surely, 2^{1540077785540} is an apocalyptic number.

1540077785540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540077785540 is an abundant number, since it is smaller than the sum of its proper divisors (2156108900092).

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

1540077785540 is a wasteful number, since it uses less digits than its factorization.

1540077785540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000555627 (or 11000555625 counting only the distinct ones).

The product of its (nonzero) digits is 5488000, while the sum is 53.

The spelling of 1540077785540 in words is "one trillion, five hundred forty billion, seventy-seven million, seven hundred eighty-five thousand, five hundred forty".