1540078307900 has 108 divisors (see below), whose sum is σ = 3675180981696. Its totient is φ = 559757721600.

The previous prime is 1540078307881. The next prime is 1540078307903. The reversal of 1540078307900 is 97038700451.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1540078307903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25900604 + ... + 25959996.

Almost surely, 2^{1540078307900} is an apocalyptic number.

1540078307900 is a gapful number since it is divisible by the number (10) 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 1540078307900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837590490848).

1540078307900 is an abundant number, since it is smaller than the sum of its proper divisors (2135102673796).

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

1540078307900 is a wasteful number, since it uses less digits than its factorization.

1540078307900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61572 (or 61554 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The spelling of 1540078307900 in words is "one trillion, five hundred forty billion, seventy-eight million, three hundred seven thousand, nine hundred".