216435723738 has 32 divisors (see below), whose sum is σ = 469029212736. Its totient is φ = 66187041408.

The previous prime is 216435723617. The next prime is 216435723769. The reversal of 216435723738 is 837327534612.

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, 8498995 + ... + 8524422.

It is an arithmetic number, because the mean of its divisors is an integer number (14657162898).

Almost surely, 2^216435723738 is an apocalyptic number.

216435723738 is an abundant number, since it is smaller than the sum of its proper divisors (252593488998).

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

216435723738 is a wasteful number, since it uses less digits than its factorization.

216435723738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17023598.

The product of its digits is 5080320, while the sum is 51.

The spelling of 216435723738 in words is "two hundred sixteen billion, four hundred thirty-five million, seven hundred twenty-three thousand, seven hundred thirty-eight".