1378607761545 has 32 divisors (see below), whose sum is σ = 2524968592128. Its totient is φ = 629199234048.

The previous prime is 1378607761523. The next prime is 1378607761679. The reversal of 1378607761545 is 5451677068731.

It is not a de Polignac number, because 1378607761545 - 2⁵ = 1378607761513 is a prime.

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, 10575084 + ... + 10704653.

It is an arithmetic number, because the mean of its divisors is an integer number (78905268504).

Almost surely, 2^{1378607761545} is an apocalyptic number.

1378607761545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378607761545 is a deficient number, since it is larger than the sum of its proper divisors (1146360830583).

1378607761545 is a wasteful number, since it uses less digits than its factorization.

1378607761545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21280369.

The product of its (nonzero) digits is 29635200, while the sum is 60.

The spelling of 1378607761545 in words is "one trillion, three hundred seventy-eight billion, six hundred seven million, seven hundred sixty-one thousand, five hundred forty-five".