61107591 has 16 divisors (see below), whose sum is σ = 86253440. Its totient is φ = 38374560.

The previous prime is 61107587. The next prime is 61107647. The reversal of 61107591 is 19570116.

It is not a de Polignac number, because 61107591 - 2² = 61107587 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 (61107511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7356 + ... + 13278.

It is an arithmetic number, because the mean of its divisors is an integer number (5390840).

Almost surely, 2^61107591 is an apocalyptic number.

61107591 is a deficient number, since it is larger than the sum of its proper divisors (25145849).

61107591 is a wasteful number, since it uses less digits than its factorization.

61107591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6126.

The product of its (nonzero) digits is 1890, while the sum is 30.

The square root of 61107591 is about 7817.1344494002. The cubic root of 61107591 is about 393.8810204444.

The spelling of 61107591 in words is "sixty-one million, one hundred seven thousand, five hundred ninety-one".