61551512033 has 16 divisors (see below), whose sum is σ = 68611256064. Its totient is φ = 54737026560.

The previous prime is 61551512021. The next prime is 61551512069. The reversal of 61551512033 is 33021515516.

It is a cyclic number.

It is not a de Polignac number, because 61551512033 - 2⁶ = 61551511969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61551512233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1002641 + ... + 1062257.

It is an arithmetic number, because the mean of its divisors is an integer number (4288203504).

Almost surely, 2^61551512033 is an apocalyptic number.

It is an amenable number.

61551512033 is a deficient number, since it is larger than the sum of its proper divisors (7059744031).

61551512033 is a wasteful number, since it uses less digits than its factorization.

61551512033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61672.

The product of its (nonzero) digits is 13500, while the sum is 32.

The spelling of 61551512033 in words is "sixty-one billion, five hundred fifty-one million, five hundred twelve thousand, thirty-three".