154861907399 has 4 divisors (see below), whose sum is σ = 154863332040. Its totient is φ = 154860482760.

The previous prime is 154861907329. The next prime is 154861907443. The reversal of 154861907399 is 993709168451.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 154861907399 - 2³² = 150566940103 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 (154861907329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534464 + ... + 771605.

It is an arithmetic number, because the mean of its divisors is an integer number (38715833010).

Almost surely, 2^154861907399 is an apocalyptic number.

154861907399 is a deficient number, since it is larger than the sum of its proper divisors (1424641).

154861907399 is a wasteful number, since it uses less digits than its factorization.

154861907399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424640.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 154861907399 in words is "one hundred fifty-four billion, eight hundred sixty-one million, nine hundred seven thousand, three hundred ninety-nine".