61620167091 has 32 divisors (see below), whose sum is σ = 98943690240. Its totient is φ = 33323076864.

The previous prime is 61620167051. The next prime is 61620167099. The reversal of 61620167091 is 19076102616.

61620167091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61620167091 - 2⁶ = 61620167027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61620167099) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299221 + ... + 461273.

It is an arithmetic number, because the mean of its divisors is an integer number (3091990320).

Almost surely, 2^61620167091 is an apocalyptic number.

61620167091 is a deficient number, since it is larger than the sum of its proper divisors (37323523149).

61620167091 is a wasteful number, since it uses less digits than its factorization.

61620167091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163035.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 61620167091 in words is "sixty-one billion, six hundred twenty million, one hundred sixty-seven thousand, ninety-one".