1278481151900 has 18 divisors (see below), whose sum is σ = 2774304099840. Its totient is φ = 511392460720.

The previous prime is 1278481151887. The next prime is 1278481151963. The reversal of 1278481151900 is 91511848721.

It is a super-2 number, since 2×1278481151900² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6392405660 + ... + 6392405859.

Almost surely, 2^{1278481151900} is an apocalyptic number.

1278481151900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1278481151900 is an abundant number, since it is smaller than the sum of its proper divisors (1495822947940).

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

1278481151900 is a wasteful number, since it uses less digits than its factorization.

1278481151900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12784811533 (or 12784811526 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 47.

The spelling of 1278481151900 in words is "one trillion, two hundred seventy-eight billion, four hundred eighty-one million, one hundred fifty-one thousand, nine hundred".