1461720243438 has 64 divisors (see below), whose sum is σ = 3997867345920. Its totient is φ = 385508634336.

The previous prime is 1461720243437. The next prime is 1461720243469. The reversal of 1461720243438 is 8343420271641.

1461720243438 is a `hidden beast` number, since 1 + 4 + 6 + 1 + 7 + 202 + 4 + 3 + 438 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1461720243393 and 1461720243402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1461720243437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148725270 + ... + 148735097.

It is an arithmetic number, because the mean of its divisors is an integer number (62466677280).

Almost surely, 2^{1461720243438} is an apocalyptic number.

1461720243438 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1461720243438 is an abundant number, since it is smaller than the sum of its proper divisors (2536147102482).

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

1461720243438 is a wasteful number, since it uses less digits than its factorization.

1461720243438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297460398 (or 297460392 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 1461720243438 in words is "one trillion, four hundred sixty-one billion, seven hundred twenty million, two hundred forty-three thousand, four hundred thirty-eight".