1540403421400 has 96 divisors (see below), whose sum is σ = 3752791948800. Its totient is φ = 586905334400.

The previous prime is 1540403421367. The next prime is 1540403421413. The reversal of 1540403421400 is 41243040451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398835 + ... + 1799965.

It is an arithmetic number, because the mean of its divisors is an integer number (39091582800).

Almost surely, 2^{1540403421400} is an apocalyptic number.

1540403421400 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 1540403421400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1876395974400).

1540403421400 is an abundant number, since it is smaller than the sum of its proper divisors (2212388527400).

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

1540403421400 is a wasteful number, since it uses less digits than its factorization.

1540403421400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401409 (or 1401400 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 1540403421400 its reverse (41243040451), we get a palindrome (1581646461851).

The spelling of 1540403421400 in words is "one trillion, five hundred forty billion, four hundred three million, four hundred twenty-one thousand, four hundred".