1264757650 has 24 divisors (see below), whose sum is σ = 2533408164. Its totient is φ = 466987200.

The previous prime is 1264757621. The next prime is 1264757651. The reversal of 1264757650 is 567574621.

It can be written as a sum of positive squares in 6 ways, for example, as 551921049 + 712836601 = 23493^2 + 26699^2 .

It is a super-2 number, since 2×1264757650² = 3199223826467045000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1264757597 and 1264757606.

It is not an unprimeable number, because it can be changed into a prime (1264757651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 972241 + ... + 973540.

Almost surely, 2^1264757650 is an apocalyptic number.

1264757650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264757650 is an abundant number, since it is smaller than the sum of its proper divisors (1268650514).

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

1264757650 is a wasteful number, since it uses less digits than its factorization.

1264757650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945806 (or 1945801 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 1264757650 is about 35563.4313586302. The cubic root of 1264757650 is about 1081.4400229583.

The spelling of 1264757650 in words is "one billion, two hundred sixty-four million, seven hundred fifty-seven thousand, six hundred fifty".