47451517542 has 144 divisors (see below), whose sum is σ = 122786000064. Its totient is φ = 13154803200.

The previous prime is 47451517537. The next prime is 47451517549. The reversal of 47451517542 is 24571515474.

47451517542 is a `hidden beast` number, since 4 + 7 + 4 + 51 + 51 + 7 + 542 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47451517549) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3192067 + ... + 3206897.

It is an arithmetic number, because the mean of its divisors is an integer number (852680556).

Almost surely, 2^47451517542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47451517542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61393000032).

47451517542 is an abundant number, since it is smaller than the sum of its proper divisors (75334482522).

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

47451517542 is a wasteful number, since it uses less digits than its factorization.

47451517542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14987 (or 14973 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The spelling of 47451517542 in words is "forty-seven billion, four hundred fifty-one million, five hundred seventeen thousand, five hundred forty-two".