10891742440 has 32 divisors (see below), whose sum is σ = 24872194080. Its totient is φ = 4291670592.

The previous prime is 10891742363. The next prime is 10891742441. The reversal of 10891742440 is 4424719801.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 10891742393 and 10891742402.

It is not an unprimeable number, because it can be changed into a prime (10891742441) 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, 2029362 + ... + 2034721.

It is an arithmetic number, because the mean of its divisors is an integer number (777256065).

Almost surely, 2^10891742440 is an apocalyptic number.

10891742440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10891742440 is an abundant number, since it is smaller than the sum of its proper divisors (13980451640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10891742440 is a wasteful number, since it uses less digits than its factorization.

10891742440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064161 (or 4064157 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 10891742440 in words is "ten billion, eight hundred ninety-one million, seven hundred forty-two thousand, four hundred forty".