1461863687040 has 160 divisors (see below), whose sum is σ = 5220579359160. Its totient is φ = 389830302720.

The previous prime is 1461863687027. The next prime is 1461863687071. The reversal of 1461863687040 is 407863681641.

1461863687040 is a `hidden beast` number, since 1 + 461 + 8 + 63 + 6 + 87 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 14047926 + ... + 14151605.

Almost surely, 2^{1461863687040} is an apocalyptic number.

1461863687040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1461863687040 is an abundant number, since it is smaller than the sum of its proper divisors (3758715672120).

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

1461863687040 is an equidigital number, since it uses as much as digits as its factorization.

1461863687040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28199562 (or 28199541 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 1461863687040 in words is "one trillion, four hundred sixty-one billion, eight hundred sixty-three million, six hundred eighty-seven thousand, forty".