55061964 has 24 divisors (see below), whose sum is σ = 142753520. Its totient is φ = 18353952.

The previous prime is 55061939. The next prime is 55061969. The reversal of 55061964 is 46916055.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (55061969) 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, 254809 + ... + 255024.

Almost surely, 2^55061964 is an apocalyptic number.

55061964 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55061964 is an abundant number, since it is smaller than the sum of its proper divisors (87691556).

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

55061964 is a wasteful number, since it uses less digits than its factorization.

55061964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509846 (or 509838 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55061964 is about 7420.3749231424. The cubic root of 55061964 is about 380.4380083229.

The spelling of 55061964 in words is "fifty-five million, sixty-one thousand, nine hundred sixty-four".