621201156766471 has 4 divisors (see below), whose sum is σ = 621757290300952. Its totient is φ = 620645023231992.

The previous prime is 621201156766457. The next prime is 621201156766613. The reversal of 621201156766471 is 174667651102126.

621201156766471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 621201156766471 - 2²⁵ = 621201123212039 is a prime.

It is a super-3 number, since 3×621201156766471³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621201156166471) 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, 278066765565 + ... + 278066767798.

It is an arithmetic number, because the mean of its divisors is an integer number (155439322575238).

Almost surely, 2^{621201156766471} is an apocalyptic number.

621201156766471 is a deficient number, since it is larger than the sum of its proper divisors (556133534481).

621201156766471 is a wasteful number, since it uses less digits than its factorization.

621201156766471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556133534480.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 621201156766471 in words is "six hundred twenty-one trillion, two hundred one billion, one hundred fifty-six million, seven hundred sixty-six thousand, four hundred seventy-one".