4006172487520 has 96 divisors (see below), whose sum is σ = 11189654280000. Its totient is φ = 1326181226496.

The previous prime is 4006172487517. The next prime is 4006172487529. The reversal of 4006172487520 is 257842716004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006172487529) 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, 61638895 + ... + 61703854.

It is an arithmetic number, because the mean of its divisors is an integer number (116558898750).

Almost surely, 2^{4006172487520} is an apocalyptic number.

4006172487520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4006172487520 is an abundant number, since it is smaller than the sum of its proper divisors (7183481792480).

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

4006172487520 is a wasteful number, since it uses less digits than its factorization.

4006172487520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123342800 (or 123342792 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 46.

The spelling of 4006172487520 in words is "four trillion, six billion, one hundred seventy-two million, four hundred eighty-seven thousand, five hundred twenty".