61620167077 has 16 divisors (see below), whose sum is σ = 75471005952. Its totient is φ = 49155448320.

The previous prime is 61620167051. The next prime is 61620167099. The reversal of 61620167077 is 77076102616.

It is a cyclic number.

It is not a de Polignac number, because 61620167077 - 2³⁵ = 27260428709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61620167027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5166124 + ... + 5178037.

It is an arithmetic number, because the mean of its divisors is an integer number (4716937872).

Almost surely, 2^61620167077 is an apocalyptic number.

It is an amenable number.

61620167077 is a deficient number, since it is larger than the sum of its proper divisors (13850838875).

61620167077 is a wasteful number, since it uses less digits than its factorization.

61620167077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10344228.

The product of its (nonzero) digits is 148176, while the sum is 43.

The spelling of 61620167077 in words is "sixty-one billion, six hundred twenty million, one hundred sixty-seven thousand, seventy-seven".