49321978542 has 64 divisors (see below), whose sum is σ = 112264992000. Its totient is φ = 16045586784.

The previous prime is 49321978507. The next prime is 49321978561. The reversal of 49321978542 is 24587912394.

49321978542 is a `hidden beast` number, since 4 + 9 + 3 + 2 + 1 + 97 + 8 + 542 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387168 + ... + 498540.

It is an arithmetic number, because the mean of its divisors is an integer number (1754140500).

Almost surely, 2^49321978542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49321978542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56132496000).

49321978542 is an abundant number, since it is smaller than the sum of its proper divisors (62943013458).

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

49321978542 is a wasteful number, since it uses less digits than its factorization.

49321978542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111582 (or 111576 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The spelling of 49321978542 in words is "forty-nine billion, three hundred twenty-one million, nine hundred seventy-eight thousand, five hundred forty-two".