1481640728638 has 32 divisors (see below), whose sum is σ = 2588036645376. Its totient is φ = 622970064288.

The previous prime is 1481640728621. The next prime is 1481640728641. The reversal of 1481640728638 is 8368270461841.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14494495 + ... + 14596357.

It is an arithmetic number, because the mean of its divisors is an integer number (80876145168).

Almost surely, 2^{1481640728638} is an apocalyptic number.

1481640728638 is a deficient number, since it is larger than the sum of its proper divisors (1106395916738).

1481640728638 is a wasteful number, since it uses less digits than its factorization.

1481640728638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121528.

The product of its (nonzero) digits is 12386304, while the sum is 58.

The spelling of 1481640728638 in words is "one trillion, four hundred eighty-one billion, six hundred forty million, seven hundred twenty-eight thousand, six hundred thirty-eight".