1378511166254 has 16 divisors (see below), whose sum is σ = 2158442933760. Its totient is φ = 659051668440.

The previous prime is 1378511166251. The next prime is 1378511166299. The reversal of 1378511166254 is 4526611158731.

It is a super-4 number, since 4×1378511166254⁴ (a number of 50 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378511166251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5240234 + ... + 5497005.

It is an arithmetic number, because the mean of its divisors is an integer number (134902683360).

Almost surely, 2^{1378511166254} is an apocalyptic number.

1378511166254 is a deficient number, since it is larger than the sum of its proper divisors (779931767506).

1378511166254 is a wasteful number, since it uses less digits than its factorization.

1378511166254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740055.

The product of its digits is 1209600, while the sum is 50.

The spelling of 1378511166254 in words is "one trillion, three hundred seventy-eight billion, five hundred eleven million, one hundred sixty-six thousand, two hundred fifty-four".