15139745946 has 96 divisors (see below), whose sum is σ = 37479536640. Its totient is φ = 4378292352.

The previous prime is 15139745941. The next prime is 15139745983. The reversal of 15139745946 is 64954793151.

15139745946 is a `hidden beast` number, since 1 + 513 + 9 + 74 + 59 + 4 + 6 = 666.

It is a super-3 number, since 3×15139745946³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15139745892 and 15139745901.

It is not an unprimeable number, because it can be changed into a prime (15139745941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 551236 + ... + 578048.

It is an arithmetic number, because the mean of its divisors is an integer number (390411840).

Almost surely, 2^15139745946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15139745946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18739768320).

15139745946 is an abundant number, since it is smaller than the sum of its proper divisors (22339790694).

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

15139745946 is a wasteful number, since it uses less digits than its factorization.

15139745946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26980 (or 26977 counting only the distinct ones).

The product of its digits is 4082400, while the sum is 54.

The spelling of 15139745946 in words is "fifteen billion, one hundred thirty-nine million, seven hundred forty-five thousand, nine hundred forty-six".