1020264656 has 40 divisors (see below), whose sum is σ = 2095740864. Its totient is φ = 479505920.

The previous prime is 1020264617. The next prime is 1020264667. The reversal of 1020264656 is 6564620201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262181 + ... + 266043.

Almost surely, 2^1020264656 is an apocalyptic number.

1020264656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1020264656 is an abundant number, since it is smaller than the sum of its proper divisors (1075476208).

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

1020264656 is a wasteful number, since it uses less digits than its factorization.

1020264656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859 (or 4853 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 1020264656 is about 31941.5819270117. The cubic root of 1020264656 is about 1006.7097637110.

Adding to 1020264656 its reverse (6564620201), we get a palindrome (7584884857).

The spelling of 1020264656 in words is "one billion, twenty million, two hundred sixty-four thousand, six hundred fifty-six".