49578155 has 16 divisors (see below), whose sum is σ = 65578464. Its totient is φ = 35681280.

The previous prime is 49578149. The next prime is 49578157. The reversal of 49578155 is 55187594.

It is not a de Polignac number, because 49578155 - 2¹⁸ = 49316011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49578157) 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, 689 + ... + 9981.

It is an arithmetic number, because the mean of its divisors is an integer number (4098654).

Almost surely, 2^49578155 is an apocalyptic number.

49578155 is a deficient number, since it is larger than the sum of its proper divisors (16000309).

49578155 is a wasteful number, since it uses less digits than its factorization.

49578155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9406.

The product of its digits is 252000, while the sum is 44.

The square root of 49578155 is about 7041.1756830802. The cubic root of 49578155 is about 367.3641622393.

The spelling of 49578155 in words is "forty-nine million, five hundred seventy-eight thousand, one hundred fifty-five".