61956543 has 8 divisors (see below), whose sum is σ = 90118656. Its totient is φ = 37549400.

The previous prime is 61956539. The next prime is 61956577. The reversal of 61956543 is 34565916.

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

It is a cyclic number.

It is not a de Polignac number, because 61956543 - 2² = 61956539 is a prime.

It is a super-2 number, since 2×61956543² = 7677226441021698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61956343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 938703 + ... + 938768.

It is an arithmetic number, because the mean of its divisors is an integer number (11264832).

Almost surely, 2^61956543 is an apocalyptic number.

61956543 is a deficient number, since it is larger than the sum of its proper divisors (28162113).

61956543 is a wasteful number, since it uses less digits than its factorization.

61956543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877485.

The product of its digits is 97200, while the sum is 39.

The square root of 61956543 is about 7871.2478680321. The cubic root of 61956543 is about 395.6966672600.

The spelling of 61956543 in words is "sixty-one million, nine hundred fifty-six thousand, five hundred forty-three".