1265376432400 has 60 divisors (see below), whose sum is σ = 3200070418000. Its totient is φ = 479511066240.

The previous prime is 1265376432293. The next prime is 1265376432461. The reversal of 1265376432400 is 42346735621.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83240850 + ... + 83256049.

Almost surely, 2^{1265376432400} is an apocalyptic number.

1265376432400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265376432400 is an abundant number, since it is smaller than the sum of its proper divisors (1934693985600).

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

1265376432400 is a wasteful number, since it uses less digits than its factorization.

1265376432400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166496936 (or 166496925 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 1265376432400 in words is "one trillion, two hundred sixty-five billion, three hundred seventy-six million, four hundred thirty-two thousand, four hundred".