621640266431151 has 24 divisors (see below), whose sum is σ = 929302455602304. Its totient is φ = 366569198851680.

The previous prime is 621640266431143. The next prime is 621640266431189. The reversal of 621640266431151 is 151134662046126.

621640266431151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 621640266431151 - 2³ = 621640266431143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621640266431151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621640266431111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6880007355 + ... + 6880097708.

It is an arithmetic number, because the mean of its divisors is an integer number (38720935650096).

Almost surely, 2^{621640266431151} is an apocalyptic number.

621640266431151 is a deficient number, since it is larger than the sum of its proper divisors (307662189171153).

621640266431151 is a wasteful number, since it uses less digits than its factorization.

621640266431151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13760105151 (or 13760105114 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 621640266431151 in words is "six hundred twenty-one trillion, six hundred forty billion, two hundred sixty-six million, four hundred thirty-one thousand, one hundred fifty-one".