61155963 has 24 divisors (see below), whose sum is σ = 99480576. Its totient is φ = 35866800.

The previous prime is 61155949. The next prime is 61155979. The reversal of 61155963 is 36955116.

61155963 is a `hidden beast` number, since 61 + 1 + 5 + 596 + 3 = 666.

It is not a de Polignac number, because 61155963 - 2²⁵ = 27601531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61155923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6895 + ... + 13032.

It is an arithmetic number, because the mean of its divisors is an integer number (4145024).

Almost surely, 2^61155963 is an apocalyptic number.

61155963 is a deficient number, since it is larger than the sum of its proper divisors (38324613).

61155963 is a wasteful number, since it uses less digits than its factorization.

61155963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19975 (or 19972 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 61155963 is about 7820.2278099810. The cubic root of 61155963 is about 393.9849234527.

The spelling of 61155963 in words is "sixty-one million, one hundred fifty-five thousand, nine hundred sixty-three".