61495919 has 4 divisors (see below), whose sum is σ = 65113344. Its totient is φ = 57878496.

The previous prime is 61495901. The next prime is 61495933. The reversal of 61495919 is 91959416.

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 61495919 - 2¹² = 61491823 is a prime.

It is a super-2 number, since 2×61495919² = 7563496107309122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61495919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61495949) 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, 1808687 + ... + 1808720.

It is an arithmetic number, because the mean of its divisors is an integer number (16278336).

Almost surely, 2^61495919 is an apocalyptic number.

61495919 is a deficient number, since it is larger than the sum of its proper divisors (3617425).

61495919 is a wasteful number, since it uses less digits than its factorization.

61495919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617424.

The product of its digits is 87480, while the sum is 44.

The square root of 61495919 is about 7841.9333713058. The cubic root of 61495919 is about 394.7136074967.

The spelling of 61495919 in words is "sixty-one million, four hundred ninety-five thousand, nine hundred nineteen".