1305376978530 has 64 divisors (see below), whose sum is σ = 3318565448448. Its totient is φ = 327488501760.

The previous prime is 1305376978501. The next prime is 1305376978553. The reversal of 1305376978530 is 358796735031.

It is a super-2 number, since 2×1305376978530² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 707550 + ... + 1763910.

It is an arithmetic number, because the mean of its divisors is an integer number (51852585132).

Almost surely, 2^{1305376978530} is an apocalyptic number.

1305376978530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305376978530 is an abundant number, since it is smaller than the sum of its proper divisors (2013188469918).

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

1305376978530 is a wasteful number, since it uses less digits than its factorization.

1305376978530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058811.

The product of its (nonzero) digits is 14288400, while the sum is 57.

The spelling of 1305376978530 in words is "one trillion, three hundred five billion, three hundred seventy-six million, nine hundred seventy-eight thousand, five hundred thirty".