39491242560 has 672 divisors, whose sum is σ = 173963941632. Its totient is φ = 7982530560.

The previous prime is 39491242537. The next prime is 39491242561. The reversal of 39491242560 is 6524219493.

39491242560 is a `hidden beast` number, since 3 + 9 + 49 + 1 + 2 + 42 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (39491242561) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8202714 + ... + 8207526.

Almost surely, 2^39491242560 is an apocalyptic number.

39491242560 is a gapful number since it is divisible by the number (30) 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 39491242560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86981970816).

39491242560 is an abundant number, since it is smaller than the sum of its proper divisors (134472699072).

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

39491242560 is a wasteful number, since it uses less digits than its factorization.

39491242560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891 (or 4878 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 39491242560 in words is "thirty-nine billion, four hundred ninety-one million, two hundred forty-two thousand, five hundred sixty".