1378537220468 has 6 divisors (see below), whose sum is σ = 2412440135826. Its totient is φ = 689268610232.

The previous prime is 1378537220429. The next prime is 1378537220491. The reversal of 1378537220468 is 8640227358731.

It can be written as a sum of positive squares in only one way, i.e., 1165423884304 + 213113336164 = 1079548^2 + 461642^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172317152555 + ... + 172317152562.

It is an arithmetic number, because the mean of its divisors is an integer number (402073355971).

Almost surely, 2^{1378537220468} is an apocalyptic number.

It is an amenable number.

1378537220468 is a deficient number, since it is larger than the sum of its proper divisors (1033902915358).

1378537220468 is a wasteful number, since it uses less digits than its factorization.

1378537220468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344634305121 (or 344634305119 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 1378537220468 in words is "one trillion, three hundred seventy-eight billion, five hundred thirty-seven million, two hundred twenty thousand, four hundred sixty-eight".