1540621214001 has 16 divisors (see below), whose sum is σ = 2283370243200. Its totient is φ = 1026645009264.

The previous prime is 1540621213979. The next prime is 1540621214017. The reversal of 1540621214001 is 1004121260451.

1540621214001 is a `hidden beast` number, since 1 + 5 + 40 + 6 + 212 + 1 + 400 + 1 = 666.

It is not a de Polignac number, because 1540621214001 - 2¹⁵ = 1540621181233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1540621212001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12040741 + ... + 12168018.

It is an arithmetic number, because the mean of its divisors is an integer number (142710640200).

Almost surely, 2^{1540621214001} is an apocalyptic number.

It is an amenable number.

1540621214001 is a deficient number, since it is larger than the sum of its proper divisors (742749029199).

1540621214001 is a wasteful number, since it uses less digits than its factorization.

1540621214001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24211125 (or 24211119 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

Adding to 1540621214001 its reverse (1004121260451), we get a palindrome (2544742474452).

The spelling of 1540621214001 in words is "one trillion, five hundred forty billion, six hundred twenty-one million, two hundred fourteen thousand, one".