49121561808 has 80 divisors (see below), whose sum is σ = 153815006400. Its totient is φ = 14885320320.

The previous prime is 49121561803. The next prime is 49121561833. The reversal of 49121561808 is 80816512194.

It is a happy number.

49121561808 is a `hidden beast` number, since 4 + 9 + 1 + 2 + 1 + 561 + 80 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49121561803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5163763 + ... + 5173266.

It is an arithmetic number, because the mean of its divisors is an integer number (1922687580).

Almost surely, 2^49121561808 is an apocalyptic number.

49121561808 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

49121561808 is an abundant number, since it is smaller than the sum of its proper divisors (104693444592).

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

49121561808 is a wasteful number, since it uses less digits than its factorization.

49121561808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10337057 (or 10337045 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 49121561808 in words is "forty-nine billion, one hundred twenty-one million, five hundred sixty-one thousand, eight hundred eight".