64951980 has 24 divisors (see below), whose sum is σ = 181865712. Its totient is φ = 17320512.

The previous prime is 64951961. The next prime is 64951987. The reversal of 64951980 is 8915946.

It is not an unprimeable number, because it can be changed into a prime (64951987) 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, 541207 + ... + 541326.

It is an arithmetic number, because the mean of its divisors is an integer number (7577738).

Almost surely, 2^64951980 is an apocalyptic number.

64951980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64951980 is an abundant number, since it is smaller than the sum of its proper divisors (116913732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64951980 is a wasteful number, since it uses less digits than its factorization.

64951980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082545 (or 1082543 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 64951980 is about 8059.2791240904. The cubic root of 64951980 is about 401.9735385171.

The spelling of 64951980 in words is "sixty-four million, nine hundred fifty-one thousand, nine hundred eighty".