61161355 has 4 divisors (see below), whose sum is σ = 73393632. Its totient is φ = 48929080.

The previous prime is 61161343. The next prime is 61161367. The reversal of 61161355 is 55316116.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61161343) and next prime (61161367).

It is not a de Polignac number, because 61161355 - 2⁷ = 61161227 is a prime.

It is a super-2 number, since 2×61161355² = 7481422690872050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6116131 + ... + 6116140.

It is an arithmetic number, because the mean of its divisors is an integer number (18348408).

Almost surely, 2^61161355 is an apocalyptic number.

61161355 is a deficient number, since it is larger than the sum of its proper divisors (12232277).

61161355 is a wasteful number, since it uses less digits than its factorization.

61161355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12232276.

The product of its digits is 2700, while the sum is 28.

The square root of 61161355 is about 7820.5725493726. The cubic root of 61161355 is about 393.9965020690.

It can be divided in two parts, 61161 and 355, that added together give a palindrome (61516).

The spelling of 61161355 in words is "sixty-one million, one hundred sixty-one thousand, three hundred fifty-five".