1499778951960 has 256 divisors, whose sum is σ = 4758877992960. Its totient is φ = 377370132480.

The previous prime is 1499778951919. The next prime is 1499778951991. The reversal of 1499778951960 is 691598779941.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83251914 + ... + 83269926.

It is an arithmetic number, because the mean of its divisors is an integer number (18589367160).

Almost surely, 2^{1499778951960} is an apocalyptic number.

1499778951960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1499778951960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2379438996480).

1499778951960 is an abundant number, since it is smaller than the sum of its proper divisors (3259099041000).

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

1499778951960 is a wasteful number, since it uses less digits than its factorization.

1499778951960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18458 (or 18454 counting only the distinct ones).

The product of its (nonzero) digits is 308629440, while the sum is 75.

The spelling of 1499778951960 in words is "one trillion, four hundred ninety-nine billion, seven hundred seventy-eight million, nine hundred fifty-one thousand, nine hundred sixty".