61000551009 has 32 divisors (see below), whose sum is σ = 91351756800. Its totient is φ = 40228045200.

The previous prime is 61000550981. The next prime is 61000551011. The reversal of 61000551009 is 90015500016.

61000551009 is a `hidden beast` number, since 6 + 100 + 0 + 551 + 0 + 0 + 9 = 666.

61000551009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61000551009 - 2²⁸ = 60732115553 is a prime.

It is a super-2 number, since 2×61000551009² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61000551109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 943102 + ... + 1005704.

It is an arithmetic number, because the mean of its divisors is an integer number (2854742400).

Almost surely, 2^61000551009 is an apocalyptic number.

It is an amenable number.

61000551009 is a deficient number, since it is larger than the sum of its proper divisors (30351205791).

61000551009 is a wasteful number, since it uses less digits than its factorization.

61000551009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63002 (or 62996 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 27.

The spelling of 61000551009 in words is "sixty-one billion, five hundred fifty-one thousand, nine".