61551634 has 16 divisors (see below), whose sum is σ = 97054848. Its totient is φ = 29219872.

The previous prime is 61551631. The next prime is 61551653. The reversal of 61551634 is 43615516.

It is a junction number, because it is equal to n+sod(n) for n = 61551596 and 61551605.

It is not an unprimeable number, because it can be changed into a prime (61551631) 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, 1419 + ... + 11185.

It is an arithmetic number, because the mean of its divisors is an integer number (6065928).

Almost surely, 2^61551634 is an apocalyptic number.

61551634 is a deficient number, since it is larger than the sum of its proper divisors (35503214).

61551634 is a wasteful number, since it uses less digits than its factorization.

61551634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9929.

The product of its digits is 10800, while the sum is 31.

The square root of 61551634 is about 7845.4849435838. The cubic root of 61551634 is about 394.8327743777.

The spelling of 61551634 in words is "sixty-one million, five hundred fifty-one thousand, six hundred thirty-four".