61561495 has 8 divisors (see below), whose sum is σ = 74043216. Its totient is φ = 49136256.

The previous prime is 61561483. The next prime is 61561529. The reversal of 61561495 is 59416516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61561495 - 2²¹ = 59464343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11682 + ... + 16111.

It is an arithmetic number, because the mean of its divisors is an integer number (9255402).

Almost surely, 2^61561495 is an apocalyptic number.

61561495 is a deficient number, since it is larger than the sum of its proper divisors (12481721).

61561495 is a wasteful number, since it uses less digits than its factorization.

61561495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28241.

The product of its digits is 32400, while the sum is 37.

The square root of 61561495 is about 7846.1133690509. The cubic root of 61561495 is about 394.8538582376.

The spelling of 61561495 in words is "sixty-one million, five hundred sixty-one thousand, four hundred ninety-five".