540319626721 has 32 divisors (see below), whose sum is σ = 638925428736. Its totient is φ = 447304704000.

The previous prime is 540319626719. The next prime is 540319626727. The reversal of 540319626721 is 127626913045.

It is a happy number.

It is not a de Polignac number, because 540319626721 - 2¹ = 540319626719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (540319626727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28562256 + ... + 28581166.

It is an arithmetic number, because the mean of its divisors is an integer number (19966419648).

Almost surely, 2^540319626721 is an apocalyptic number.

It is an amenable number.

540319626721 is a deficient number, since it is larger than the sum of its proper divisors (98605802015).

540319626721 is a wasteful number, since it uses less digits than its factorization.

540319626721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19953.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 540319626721 in words is "five hundred forty billion, three hundred nineteen million, six hundred twenty-six thousand, seven hundred twenty-one".