49161557 has 12 divisors (see below), whose sum is σ = 51760800. Its totient is φ = 46687608.

The previous prime is 49161527. The next prime is 49161559. The reversal of 49161557 is 75516194.

It is not a de Polignac number, because 49161557 - 2¹⁸ = 48899413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49161557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49161559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105038 + ... + 105504.

It is an arithmetic number, because the mean of its divisors is an integer number (4313400).

Almost surely, 2^49161557 is an apocalyptic number.

It is an amenable number.

49161557 is a deficient number, since it is larger than the sum of its proper divisors (2599243).

49161557 is a wasteful number, since it uses less digits than its factorization.

49161557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 689 counting only the distinct ones).

The product of its digits is 37800, while the sum is 38.

The square root of 49161557 is about 7011.5302894589. The cubic root of 49161557 is about 366.3322974718.

The spelling of 49161557 in words is "forty-nine million, one hundred sixty-one thousand, five hundred fifty-seven".