10658012778 has 128 divisors (see below), whose sum is σ = 28101427200. Its totient is φ = 2929639104.

The previous prime is 10658012737. The next prime is 10658012791. The reversal of 10658012778 is 87721085601.

It is a happy number.

It is a super-2 number, since 2×10658012778² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3363751 + ... + 3366917.

It is an arithmetic number, because the mean of its divisors is an integer number (219542400).

Almost surely, 2^10658012778 is an apocalyptic number.

10658012778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10658012778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14050713600).

10658012778 is an abundant number, since it is smaller than the sum of its proper divisors (17443414422).

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

10658012778 is a wasteful number, since it uses less digits than its factorization.

10658012778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521 (or 3515 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 45.

The spelling of 10658012778 in words is "ten billion, six hundred fifty-eight million, twelve thousand, seven hundred seventy-eight".