619401964 has 6 divisors (see below), whose sum is σ = 1083953444. Its totient is φ = 309700980.

The previous prime is 619401943. The next prime is 619401973. The reversal of 619401964 is 469104916.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77425242 + ... + 77425249.

Almost surely, 2^619401964 is an apocalyptic number.

It is an amenable number.

619401964 is a deficient number, since it is larger than the sum of its proper divisors (464551480).

619401964 is a wasteful number, since it uses less digits than its factorization.

619401964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154850495 (or 154850493 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 619401964 is about 24887.7874468583. The cubic root of 619401964 is about 852.4276453815.

The spelling of 619401964 in words is "six hundred nineteen million, four hundred one thousand, nine hundred sixty-four".