61413511 has 4 divisors (see below), whose sum is σ = 63394624. Its totient is φ = 59432400.

The previous prime is 61413497. The next prime is 61413523. The reversal of 61413511 is 11531416.

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

It is a cyclic number.

It is not a de Polignac number, because 61413511 - 2⁷ = 61413383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61413211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990510 + ... + 990571.

It is an arithmetic number, because the mean of its divisors is an integer number (15848656).

Almost surely, 2^61413511 is an apocalyptic number.

61413511 is a deficient number, since it is larger than the sum of its proper divisors (1981113).

61413511 is a wasteful number, since it uses less digits than its factorization.

61413511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981112.

The product of its digits is 360, while the sum is 22.

The square root of 61413511 is about 7836.6772933431. The cubic root of 61413511 is about 394.5372158493.

Adding to 61413511 its reverse (11531416), we get a palindrome (72944927).

The spelling of 61413511 in words is "sixty-one million, four hundred thirteen thousand, five hundred eleven".