61511090 has 16 divisors (see below), whose sum is σ = 111756672. Its totient is φ = 24374064.

The previous prime is 61511089. The next prime is 61511101. The reversal of 61511090 is 9011516.

It is a super-2 number, since 2×61511090² = 7567228385976200, which contains 22 as substring.

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, 27674 + ... + 29813.

It is an arithmetic number, because the mean of its divisors is an integer number (6984792).

Almost surely, 2^61511090 is an apocalyptic number.

61511090 is a deficient number, since it is larger than the sum of its proper divisors (50245582).

61511090 is a wasteful number, since it uses less digits than its factorization.

61511090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57601.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 61511090 is about 7842.9006113810. The cubic root of 61511090 is about 394.7460633511.

The spelling of 61511090 in words is "sixty-one million, five hundred eleven thousand, ninety".