1980706157 has 16 divisors (see below), whose sum is σ = 2136056832. Its totient is φ = 1831272960.

The previous prime is 1980706151. The next prime is 1980706181. The reversal of 1980706157 is 7516070891.

It is a cyclic number.

It is not a de Polignac number, because 1980706157 - 2¹⁸ = 1980444013 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 (1980706151) 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, 1166333 + ... + 1168029.

It is an arithmetic number, because the mean of its divisors is an integer number (133503552).

Almost surely, 2^1980706157 is an apocalyptic number.

It is an amenable number.

1980706157 is a deficient number, since it is larger than the sum of its proper divisors (155350675).

1980706157 is a wasteful number, since it uses less digits than its factorization.

1980706157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 1980706157 is about 44505.1250644238. The cubic root of 1980706157 is about 1255.8564984486.

The spelling of 1980706157 in words is "one billion, nine hundred eighty million, seven hundred six thousand, one hundred fifty-seven".