1264051989270 has 576 divisors, whose sum is σ = 4023894910464. Its totient is φ = 269514362880.

The previous prime is 1264051989257. The next prime is 1264051989271. The reversal of 1264051989270 is 729891504621.

It is a happy number.

1264051989270 is a `hidden beast` number, since 1 + 2 + 6 + 40 + 519 + 89 + 2 + 7 + 0 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264051989271) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2574443725 + ... + 2574444215.

It is an arithmetic number, because the mean of its divisors is an integer number (6985928664).

Almost surely, 2^{1264051989270} is an apocalyptic number.

1264051989270 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 1264051989270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011947455232).

1264051989270 is an abundant number, since it is smaller than the sum of its proper divisors (2759842921194).

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

1264051989270 is a wasteful number, since it uses less digits than its factorization.

1264051989270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 1264051989270 in words is "one trillion, two hundred sixty-four billion, fifty-one million, nine hundred eighty-nine thousand, two hundred seventy".