61620397005 has 16 divisors (see below), whose sum is σ = 98628828480. Its totient is φ = 32852147328.

The previous prime is 61620397001. The next prime is 61620397021. The reversal of 61620397005 is 50079302616.

It is not a de Polignac number, because 61620397005 - 2² = 61620397001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620397001) 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, 711727 + ... + 793596.

It is an arithmetic number, because the mean of its divisors is an integer number (6164301780).

Almost surely, 2^61620397005 is an apocalyptic number.

It is an amenable number.

61620397005 is a deficient number, since it is larger than the sum of its proper divisors (37008431475).

61620397005 is a wasteful number, since it uses less digits than its factorization.

61620397005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508060.

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 61620397005 in words is "sixty-one billion, six hundred twenty million, three hundred ninety-seven thousand, five".