61416573985 has 64 divisors (see below), whose sum is σ = 82819376640. Its totient is φ = 43426437120.

The previous prime is 61416573949. The next prime is 61416574003. The reversal of 61416573985 is 58937561416.

It is not a de Polignac number, because 61416573985 - 2⁹ = 61416573473 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56293290 + ... + 56294380.

It is an arithmetic number, because the mean of its divisors is an integer number (1294052760).

Almost surely, 2^61416573985 is an apocalyptic number.

61416573985 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61416573985 is a deficient number, since it is larger than the sum of its proper divisors (21402802655).

61416573985 is a wasteful number, since it uses less digits than its factorization.

61416573985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498.

The product of its digits is 5443200, while the sum is 55.

The spelling of 61416573985 in words is "sixty-one billion, four hundred sixteen million, five hundred seventy-three thousand, nine hundred eighty-five".