49391501697 has 6 divisors (see below), whose sum is σ = 71343280242. Its totient is φ = 32927667792.

The previous prime is 49391501651. The next prime is 49391501707. The reversal of 49391501697 is 79610519394.

49391501697 is a `hidden beast` number, since 49 + 3 + 9 + 1 + 501 + 6 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24897999681 + 24493502016 = 157791^2 + 156504^2 .

It is not a de Polignac number, because 49391501697 - 2²³ = 49383113089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49391505697) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2743972308 + ... + 2743972325.

It is an arithmetic number, because the mean of its divisors is an integer number (11890546707).

Almost surely, 2^49391501697 is an apocalyptic number.

It is an amenable number.

49391501697 is a deficient number, since it is larger than the sum of its proper divisors (21951778545).

49391501697 is a wasteful number, since it uses less digits than its factorization.

49391501697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5487944639 (or 5487944636 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 49391501697 in words is "forty-nine billion, three hundred ninety-one million, five hundred one thousand, six hundred ninety-seven".