1378516503 has 16 divisors (see below), whose sum is σ = 2262181376. Its totient is φ = 727129440.

The previous prime is 1378516501. The next prime is 1378516549. The reversal of 1378516503 is 3056158731.

It is a happy number.

It is not a de Polignac number, because 1378516503 - 2¹ = 1378516501 is a prime.

It is a super-4 number, since 4×1378516503⁴ (a number of 38 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378516501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2524483 + ... + 2525028.

It is an arithmetic number, because the mean of its divisors is an integer number (141386336).

Almost surely, 2^1378516503 is an apocalyptic number.

1378516503 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1378516503 is a deficient number, since it is larger than the sum of its proper divisors (883664873).

1378516503 is a wasteful number, since it uses less digits than its factorization.

1378516503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049534.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1378516503 is about 37128.3786745395. The cubic root of 1378516503 is about 1112.9371937865.

The spelling of 1378516503 in words is "one billion, three hundred seventy-eight million, five hundred sixteen thousand, five hundred three".