1265379077200 has 540 divisors, whose sum is σ = 3820051572480. Its totient is φ = 401355440640.

The previous prime is 1265379077159. The next prime is 1265379077201. The reversal of 1265379077200 is 27709735621.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265379077201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 304248721 + ... + 304252879.

Almost surely, 2^{1265379077200} is an apocalyptic number.

1265379077200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265379077200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1910025786240).

1265379077200 is an abundant number, since it is smaller than the sum of its proper divisors (2554672495280).

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

1265379077200 is a wasteful number, since it uses less digits than its factorization.

1265379077200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272 (or 4235 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 49.

The spelling of 1265379077200 in words is "one trillion, two hundred sixty-five billion, three hundred seventy-nine million, seventy-seven thousand, two hundred".