61555465 has 4 divisors (see below), whose sum is σ = 73866564. Its totient is φ = 49244368.

The previous prime is 61555451. The next prime is 61555469. The reversal of 61555465 is 56455516.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46063369 + 15492096 = 6787^2 + 3936^2 .

It is a cyclic number.

It is not a de Polignac number, because 61555465 - 2⁵ = 61555433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61555469) 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, 6155542 + ... + 6155551.

It is an arithmetic number, because the mean of its divisors is an integer number (18466641).

Almost surely, 2^61555465 is an apocalyptic number.

It is an amenable number.

61555465 is a deficient number, since it is larger than the sum of its proper divisors (12311099).

61555465 is a wasteful number, since it uses less digits than its factorization.

61555465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12311098.

The product of its digits is 90000, while the sum is 37.

The square root of 61555465 is about 7845.7290929524. The cubic root of 61555465 is about 394.8409657280.

The spelling of 61555465 in words is "sixty-one million, five hundred fifty-five thousand, four hundred sixty-five".