47451093840 has 80 divisors (see below), whose sum is σ = 163442664000. Its totient is φ = 12653624448.

The previous prime is 47451093799. The next prime is 47451093841. The reversal of 47451093840 is 4839015474.

47451093840 is a `hidden beast` number, since 4 + 7 + 4 + 510 + 93 + 8 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×47451093840² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47451093841) 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, 10981890 + ... + 10986209.

It is an arithmetic number, because the mean of its divisors is an integer number (2043033300).

Almost surely, 2^47451093840 is an apocalyptic number.

47451093840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47451093840 is an abundant number, since it is smaller than the sum of its proper divisors (115991570160).

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

47451093840 is a wasteful number, since it uses less digits than its factorization.

47451093840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21968121 (or 21968109 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 47451093840 in words is "forty-seven billion, four hundred fifty-one million, ninety-three thousand, eight hundred forty".