15540806949696 has 840 divisors, whose sum is σ = 56800392839424. Its totient is φ = 4044043100160.

The previous prime is 15540806949677. The next prime is 15540806949719. The reversal of 15540806949696 is 69694960804551.

15540806949696 is a `hidden beast` number, since 1 + 5 + 5 + 40 + 8 + 0 + 6 + 9 + 496 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 728817691 + ... + 728839013.

Almost surely, 2^{15540806949696} is an apocalyptic number.

15540806949696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15540806949696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28400196419712).

15540806949696 is an abundant number, since it is smaller than the sum of its proper divisors (41259585889728).

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

15540806949696 is a wasteful number, since it uses less digits than its factorization.

15540806949696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21417 (or 21383 counting only the distinct ones).

The product of its (nonzero) digits is 503884800, while the sum is 72.

The spelling of 15540806949696 in words is "fifteen trillion, five hundred forty billion, eight hundred six million, nine hundred forty-nine thousand, six hundred ninety-six".