16201778040 has 192 divisors, whose sum is σ = 63345484800. Its totient is φ = 3508344576.

The previous prime is 16201778027. The next prime is 16201778077. The reversal of 16201778040 is 4087710261.

It is a super-2 number, since 2×16201778040² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16201777986 and 16201778004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121312 + ... + 217071.

It is an arithmetic number, because the mean of its divisors is an integer number (329924400).

Almost surely, 2^16201778040 is an apocalyptic number.

16201778040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16201778040 is an abundant number, since it is smaller than the sum of its proper divisors (47143706760).

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

16201778040 is a wasteful number, since it uses less digits than its factorization.

16201778040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338426 (or 338419 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 16201778040 in words is "sixteen billion, two hundred one million, seven hundred seventy-eight thousand, forty".