61651551023 has 2 divisors, whose sum is σ = 61651551024. Its totient is φ = 61651551022.

The previous prime is 61651550999. The next prime is 61651551029. The reversal of 61651551023 is 32015515616.

61651551023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61651551023 - 2⁸ = 61651550767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61651551029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825775511 + 30825775512.

It is an arithmetic number, because the mean of its divisors is an integer number (30825775512).

Almost surely, 2^61651551023 is an apocalyptic number.

61651551023 is a deficient number, since it is larger than the sum of its proper divisors (1).

61651551023 is an equidigital number, since it uses as much as digits as its factorization.

61651551023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 61651551023 in words is "sixty-one billion, six hundred fifty-one million, five hundred fifty-one thousand, twenty-three".