1061318640 has 80 divisors (see below), whose sum is σ = 3352205088. Its totient is φ = 277675008.

The previous prime is 1061318633. The next prime is 1061318651. The reversal of 1061318640 is 468131601.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1061318640² = 2252794511222899200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1061318598 and 1061318607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28999 + ... + 54438.

Almost surely, 2^1061318640 is an apocalyptic number.

1061318640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1061318640 is an abundant number, since it is smaller than the sum of its proper divisors (2290886448).

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

1061318640 is a wasteful number, since it uses less digits than its factorization.

1061318640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83506 (or 83500 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1061318640 is about 32577.8857509201. The cubic root of 1061318640 is about 1020.0354466728.

The spelling of 1061318640 in words is "one billion, sixty-one million, three hundred eighteen thousand, six hundred forty".