61156345 has 8 divisors (see below), whose sum is σ = 77250240. Its totient is φ = 46350000.

The previous prime is 61156339. The next prime is 61156369. The reversal of 61156345 is 54365116.

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

It is not a de Polignac number, because 61156345 - 2⁷ = 61156217 is a prime.

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, 321781 + ... + 321970.

It is an arithmetic number, because the mean of its divisors is an integer number (9656280).

Almost surely, 2^61156345 is an apocalyptic number.

It is an amenable number.

61156345 is a deficient number, since it is larger than the sum of its proper divisors (16093895).

61156345 is a wasteful number, since it uses less digits than its factorization.

61156345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643775.

The product of its digits is 10800, while the sum is 31.

The square root of 61156345 is about 7820.2522337838. The cubic root of 61156345 is about 393.9857437703.

The spelling of 61156345 in words is "sixty-one million, one hundred fifty-six thousand, three hundred forty-five".