401267770849 has 9 divisors (see below), whose sum is σ = 441070580881. Its totient is φ = 364782548020.

The previous prime is 401267770843. The next prime is 401267770921. The reversal of 401267770849 is 948077762104.

It is a happy number.

The square root of 401267770849 is 633457.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 401267770849 - 2⁵ = 401267770817 is a prime.

It is a super-2 number, since 2×401267770849² (a number of 24 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 401267770849.

It is not an unprimeable number, because it can be changed into a prime (401267770843) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6939234 + ... + 6996820.

Almost surely, 2^401267770849 is an apocalyptic number.

401267770849 is the 633457-th square number.

401267770849 is the 316729-th centered octagonal number.

It is an amenable number.

401267770849 is a deficient number, since it is larger than the sum of its proper divisors (39802810032).

401267770849 is an frugal number, since it uses more digits than its factorization.

401267770849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115196 (or 57598 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 55.

The spelling of 401267770849 in words is "four hundred one billion, two hundred sixty-seven million, seven hundred seventy thousand, eight hundred forty-nine".