1061613990 has 192 divisors, whose sum is σ = 3011613696. Its totient is φ = 258736896.

The previous prime is 1061613989. The next prime is 1061613997. The reversal of 1061613990 is 993161601.

1061613990 is a `hidden beast` number, since 1 + 0 + 616 + 1 + 39 + 9 + 0 = 666.

It is a super-2 number, since 2×1061613990² = 2254048527527440200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061613997) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6356887 + ... + 6357053.

It is an arithmetic number, because the mean of its divisors is an integer number (15685488).

Almost surely, 2^1061613990 is an apocalyptic number.

1061613990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1061613990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505806848).

1061613990 is an abundant number, since it is smaller than the sum of its proper divisors (1949999706).

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

1061613990 is a wasteful number, since it uses less digits than its factorization.

1061613990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1061613990 is about 32582.4184185275. The cubic root of 1061613990 is about 1020.1300583869.

The spelling of 1061613990 in words is "one billion, sixty-one million, six hundred thirteen thousand, nine hundred ninety".