16049426640 has 640 divisors, whose sum is σ = 60188147712. Its totient is φ = 3499130880.

The previous prime is 16049426633. The next prime is 16049426641. The reversal of 16049426640 is 4662494061.

It is a junction number, because it is equal to n+sod(n) for n = 16049426592 and 16049426601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16049426641) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 70702207 + ... + 70702433.

Almost surely, 2^16049426640 is an apocalyptic number.

16049426640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16049426640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30094073856).

16049426640 is an abundant number, since it is smaller than the sum of its proper divisors (44138721072).

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

16049426640 is a wasteful number, since it uses less digits than its factorization.

16049426640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 16049426640 in words is "sixteen billion, forty-nine million, four hundred twenty-six thousand, six hundred forty".