49697157887999 has 4 divisors (see below), whose sum is σ = 49697188462560. Its totient is φ = 49697127313440.

The previous prime is 49697157887983. The next prime is 49697157888029. The reversal of 49697157887999 is 99978875179694.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 49697157887999 - 2⁴ = 49697157887983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49697157887929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12703559 + ... + 16148520.

It is an arithmetic number, because the mean of its divisors is an integer number (12424297115640).

Almost surely, 2^{49697157887999} is an apocalyptic number.

49697157887999 is a deficient number, since it is larger than the sum of its proper divisors (30574561).

49697157887999 is a wasteful number, since it uses less digits than its factorization.

49697157887999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30574560.

The product of its digits is 155549237760, while the sum is 98.

The spelling of 49697157887999 in words is "forty-nine trillion, six hundred ninety-seven billion, one hundred fifty-seven million, eight hundred eighty-seven thousand, nine hundred ninety-nine".