61561942 has 8 divisors (see below), whose sum is σ = 99446256. Its totient is φ = 28413192.

The previous prime is 61561933. The next prime is 61561943. The reversal of 61561942 is 24916516.

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

It is a super-2 number, since 2×61561942² = 7579745405622728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61561898 and 61561907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61561943) 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, 1183858 + ... + 1183909.

It is an arithmetic number, because the mean of its divisors is an integer number (12430782).

Almost surely, 2^61561942 is an apocalyptic number.

61561942 is a deficient number, since it is larger than the sum of its proper divisors (37884314).

61561942 is a wasteful number, since it uses less digits than its factorization.

61561942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367782.

The product of its digits is 12960, while the sum is 34.

The square root of 61561942 is about 7846.1418544403. The cubic root of 61561942 is about 394.8548139175.

The spelling of 61561942 in words is "sixty-one million, five hundred sixty-one thousand, nine hundred forty-two".