1061019864 has 64 divisors (see below), whose sum is σ = 2951145600. Its totient is φ = 353209248.

The previous prime is 1061019863. The next prime is 1061019871. The reversal of 1061019864 is 4689101601.

It is a happy number.

It is a super-2 number, since 2×1061019864² = 2251526303605156992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1061019863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187947 + ... + 193509.

It is an arithmetic number, because the mean of its divisors is an integer number (46111650).

Almost surely, 2^1061019864 is an apocalyptic number.

It is an amenable number.

1061019864 is an abundant number, since it is smaller than the sum of its proper divisors (1890125736).

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

1061019864 is a wasteful number, since it uses less digits than its factorization.

1061019864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461 (or 6451 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1061019864 is about 32573.2998635385. The cubic root of 1061019864 is about 1019.9397196210.

The spelling of 1061019864 in words is "one billion, sixty-one million, nineteen thousand, eight hundred sixty-four".