1540642797312 has 288 divisors, whose sum is σ = 4283224565760. Its totient is φ = 491066081280.

The previous prime is 1540642797301. The next prime is 1540642797367. The reversal of 1540642797312 is 2137972460451.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1806145878 + ... + 1806146730.

It is an arithmetic number, because the mean of its divisors is an integer number (14872307520).

Almost surely, 2^{1540642797312} is an apocalyptic number.

1540642797312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540642797312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2141612282880).

1540642797312 is an abundant number, since it is smaller than the sum of its proper divisors (2742581768448).

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

1540642797312 is a wasteful number, since it uses less digits than its factorization.

1540642797312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1705 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 1540642797312 in words is "one trillion, five hundred forty billion, six hundred forty-two million, seven hundred ninety-seven thousand, three hundred twelve".