4540215401551 has 4 divisors (see below), whose sum is σ = 4544662234504. Its totient is φ = 4535768568600.

The previous prime is 4540215401531. The next prime is 4540215401599. The reversal of 4540215401551 is 1551045120454.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4540215401551 - 2⁹ = 4540215401039 is a prime.

It is a super-2 number, since 2×4540215401551² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4540215401551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4540215401531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2223414945 + ... + 2223416986.

It is an arithmetic number, because the mean of its divisors is an integer number (1136165558626).

Almost surely, 2^{4540215401551} is an apocalyptic number.

4540215401551 is a deficient number, since it is larger than the sum of its proper divisors (4446832953).

4540215401551 is a wasteful number, since it uses less digits than its factorization.

4540215401551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4446832952.

The product of its (nonzero) digits is 80000, while the sum is 37.

The spelling of 4540215401551 in words is "four trillion, five hundred forty billion, two hundred fifteen million, four hundred one thousand, five hundred fifty-one".