61620421056423 has 8 divisors (see below), whose sum is σ = 82160696107008. Its totient is φ = 41080213355064.

The previous prime is 61620421056407. The next prime is 61620421056461. The reversal of 61620421056423 is 32465012402616.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61620421056423 - 2⁴ = 61620421056407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620421056323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14662311 + ... + 18390872.

It is an arithmetic number, because the mean of its divisors is an integer number (10270087013376).

Almost surely, 2^{61620421056423} is an apocalyptic number.

61620421056423 is a deficient number, since it is larger than the sum of its proper divisors (20540275050585).

61620421056423 is a wasteful number, since it uses less digits than its factorization.

61620421056423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33674613.

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 61620421056423 in words is "sixty-one trillion, six hundred twenty billion, four hundred twenty-one million, fifty-six thousand, four hundred twenty-three".