49154071638 has 64 divisors (see below), whose sum is σ = 118866147840. Its totient is φ = 13237281792.

The previous prime is 49154071621. The next prime is 49154071639. The reversal of 49154071638 is 83617045194.

It is a super-2 number, since 2×49154071638² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49154071639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 870 + ... + 313542.

It is an arithmetic number, because the mean of its divisors is an integer number (1857283560).

Almost surely, 2^49154071638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 49154071638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59433073920).

49154071638 is an abundant number, since it is smaller than the sum of its proper divisors (69712076202).

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

49154071638 is a wasteful number, since it uses less digits than its factorization.

49154071638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312901.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 49154071638 in words is "forty-nine billion, one hundred fifty-four million, seventy-one thousand, six hundred thirty-eight".