16291391380 has 48 divisors (see below), whose sum is σ = 39517523136. Its totient is φ = 5575662080.

The previous prime is 16291391357. The next prime is 16291391383. The reversal of 16291391380 is 8319319261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16291391383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2174254 + ... + 2181733.

It is an arithmetic number, because the mean of its divisors is an integer number (823281732).

Almost surely, 2^16291391380 is an apocalyptic number.

16291391380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16291391380 is an abundant number, since it is smaller than the sum of its proper divisors (23226131756).

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

16291391380 is a wasteful number, since it uses less digits than its factorization.

16291391380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356024 (or 4356022 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 16291391380 in words is "sixteen billion, two hundred ninety-one million, three hundred ninety-one thousand, three hundred eighty".