10491978403 has 8 divisors (see below), whose sum is σ = 10528927920. Its totient is φ = 10455068160.

The previous prime is 10491978377. The next prime is 10491978407. The reversal of 10491978403 is 30487919401.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10491978403 - 2¹³ = 10491970211 is a prime.

It is a super-2 number, since 2×10491978403² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10491978407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588403 + ... + 605971.

It is an arithmetic number, because the mean of its divisors is an integer number (1316115990).

Almost surely, 2^10491978403 is an apocalyptic number.

10491978403 is a deficient number, since it is larger than the sum of its proper divisors (36949517).

10491978403 is a wasteful number, since it uses less digits than its factorization.

10491978403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19637.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 10491978403 in words is "ten billion, four hundred ninety-one million, nine hundred seventy-eight thousand, four hundred three".