1285745554920 has 128 divisors (see below), whose sum is σ = 4081508352000. Its totient is φ = 323119192320.

The previous prime is 1285745554913. The next prime is 1285745554937. The reversal of 1285745554920 is 294555475821.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1040760 + ... + 1911719.

It is an arithmetic number, because the mean of its divisors is an integer number (31886784000).

Almost surely, 2^{1285745554920} is an apocalyptic number.

1285745554920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285745554920 is an abundant number, since it is smaller than the sum of its proper divisors (2795762797080).

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

1285745554920 is a wasteful number, since it uses less digits than its factorization.

1285745554920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952703 (or 2952699 counting only the distinct ones).

The product of its (nonzero) digits is 20160000, while the sum is 57.

The spelling of 1285745554920 in words is "one trillion, two hundred eighty-five billion, seven hundred forty-five million, five hundred fifty-four thousand, nine hundred twenty".