621201156766469 has 16 divisors (see below), whose sum is σ = 661788894513600. Its totient is φ = 581403027499776.

The previous prime is 621201156766457. The next prime is 621201156766613. The reversal of 621201156766469 is 964667651102126.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621201156766469 is a prime.

It is a super-2 number, since 2×621201156766469² (a number of 30 digits) contains 22 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 (621201156762469) 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, 67138787 + ... + 75828879.

It is an arithmetic number, because the mean of its divisors is an integer number (41361805907100).

Almost surely, 2^{621201156766469} is an apocalyptic number.

It is an amenable number.

621201156766469 is a deficient number, since it is larger than the sum of its proper divisors (40587737747131).

621201156766469 is a wasteful number, since it uses less digits than its factorization.

621201156766469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735524.

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 621201156766469 in words is "six hundred twenty-one trillion, two hundred one billion, one hundred fifty-six million, seven hundred sixty-six thousand, four hundred sixty-nine".