10391967481 has 9 divisors (see below), whose sum is σ = 12089445381. Its totient is φ = 8906789052.

The previous prime is 10391967457. The next prime is 10391967491. The reversal of 10391967481 is 18476919301.

The square root of 10391967481 is 101941.

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

It is not a de Polignac number, because 10391967481 - 2¹⁹ = 10391443193 is a prime.

It is a super-2 number, since 2×10391967481² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10391967401) 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, 706306 + ... + 720868.

It is an arithmetic number, because the mean of its divisors is an integer number (1343271709).

Almost surely, 2^10391967481 is an apocalyptic number.

10391967481 is the 101941-st square number.

10391967481 is the 50971-st centered octagonal number.

It is an amenable number.

10391967481 is a deficient number, since it is larger than the sum of its proper divisors (1697477900).

10391967481 is an frugal number, since it uses more digits than its factorization.

10391967481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29140 (or 14570 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

Multiplying 10391967481 by its sum of digits (49), we get a square (509206406569 = 713587²).

10391967481 divided by its sum of digits (49) gives a square (212080969 = 14563²).

The spelling of 10391967481 in words is "ten billion, three hundred ninety-one million, nine hundred sixty-seven thousand, four hundred eighty-one".