61287083658 has 24 divisors (see below), whose sum is σ = 139777560000. Its totient is φ = 19353815784.

The previous prime is 61287083621. The next prime is 61287083713. The reversal of 61287083658 is 85638078216.

It is a super-2 number, since 2×61287083658² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89600658 + ... + 89601341.

It is an arithmetic number, because the mean of its divisors is an integer number (5824065000).

Almost surely, 2^61287083658 is an apocalyptic number.

61287083658 is an abundant number, since it is smaller than the sum of its proper divisors (78490476342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61287083658 is a wasteful number, since it uses less digits than its factorization.

61287083658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179202026 (or 179202023 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 61287083658 in words is "sixty-one billion, two hundred eighty-seven million, eighty-three thousand, six hundred fifty-eight".