49521397651 has 16 divisors (see below), whose sum is σ = 54928600416. Its totient is φ = 44265600000.

The previous prime is 49521397643. The next prime is 49521397663. The reversal of 49521397651 is 15679312594.

It is a cyclic number.

It is not a de Polignac number, because 49521397651 - 2³ = 49521397643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49521397151) 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, 2122851 + ... + 2146051.

It is an arithmetic number, because the mean of its divisors is an integer number (3433037526).

Almost surely, 2^49521397651 is an apocalyptic number.

49521397651 is a deficient number, since it is larger than the sum of its proper divisors (5407202765).

49521397651 is a wasteful number, since it uses less digits than its factorization.

49521397651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26454.

The product of its digits is 2041200, while the sum is 52.

The spelling of 49521397651 in words is "forty-nine billion, five hundred twenty-one million, three hundred ninety-seven thousand, six hundred fifty-one".